dnst signzone produced TTLs differ to that of LDNS

[ximon18]

LDNS:

;; Zone: example.com.
;
example.com.	86400	IN	SOA	ns.example.com. noc.dns.example.org. 2020080302 7200 3600 1209600 3600
example.com.	86400	IN	RRSIG	SOA 13 2 86400 19700101000140 20241202085815 29203 example.com. y9PUFOgKMzIlP5hN4bn8vT7QrSaHPYgbP2/PvrBGEcOMR6gUe3HBhp+kY4b6pfAHVmwPWKPiNU/atdh7Ar0trQ==
;
example.com.	5000	IN	A	192.0.2.1
example.com.	5000	IN	RRSIG	A 13 2 5000 19700101000140 20241202085815 29203 example.com. rFYHNouvxebsrS7lecnBjHjCyvAYu4T0D4O+cUGQLZi0MOxodaGqL04mBVU/I1BveMx065DRVPeYrbJQpfFPWQ==
example.com.	86400	IN	NS	example.com.
example.com.	86400	IN	RRSIG	NS 13 2 86400 19700101000140 20241202085815 29203 example.com. TcI4Gi23LkBe/fYCDdTrlnDL100qieH674B0bxEEddKXbCFozXNJ2PQ6JEspYrM8eBOJ6gCdFxYWHDxeG2YLow==
example.com.	86400	IN	AAAA	2001:db8::3
example.com.	86400	IN	RRSIG	AAAA 13 2 86400 19700101000140 20241202085815 29203 example.com. 6NfeitU77yGhJ0cA1BT4ylIqKoh7s1krohtchntEcacW+RV3ptmwsj8UujZAIxC53hSqWLztyMonUeYiHPv0tw==
example.com.	86400	IN	DNSKEY	256 3 13 He3P9aBLDe2L9MeQfGU96jnOrULzhRVqHkYuhBLtmY19zgVdvHFcgvtMBZdns36De5hPuzD1Hhi982d1uxFcuQ== ;{id = 29203 (zsk), size = 256b}
example.com.	86400	IN	DNSKEY	257 3 13 6W4xnMJ+f3Tzdat5635hP6KhMblsaeJDPijAqkVAotZGjXvBs5KWTyZiiXYJ/rNcAi3xf+TbQ4NOgOD7lwapaQ== ;{id = 23561 (ksk), size = 256b}
example.com.	86400	IN	RRSIG	DNSKEY 13 2 86400 19700101000140 20241202085815 23561 example.com. 9hzT5JBaVjdWPgvN75/xaKEOHtfkHbZFfwV4bDS+ogBxaUoquXH5/JL74FFJEby8uE/999QMvxsdTeU+qJGcDw==
example.com.	3600	IN	NSEC3PARAM	1 0 1 - 
example.com.	3600	IN	RRSIG	NSEC3PARAM 13 2 3600 19700101000140 20241202085815 29203 example.com. U/cijwOM6wQqkgF1hkiC4HnaBrijKpIhOc7dI30SNFI3yZDkAHmQunaU0fhLXDoquUFSI4L2g1p7nL3iao/szQ==
9vq38lj9qs6s1aruer131mbtsfnvek2p.example.com.	3600	IN	NSEC3	1 0 1 -  hm8a6p4n35dquoan98hvfpnli8r7abn9 A NS SOA AAAA RRSIG DNSKEY NSEC3PARAM  ;{ flags: -, from: example.com. to: mail.example.com.}
9vq38lj9qs6s1aruer131mbtsfnvek2p.example.com.	3600	IN	RRSIG	NSEC3 13 3 3600 19700101000140 20241202085815 29203 example.com. JKXWpbEMF3Vq0SXYBdgcdMUXbo0L7bLdUyUMaAbrhx1sNgPdp/m0vx3/1B7UvZndae2rEphJCCbXq+PW9V3RBA==
;
mail.example.com.	86400	IN	MX	10 example.com.
mail.example.com.	86400	IN	RRSIG	MX 13 3 86400 19700101000140 20241202085815 29203 example.com. LtHEjsmzReUY7ak2sn0KeM+whz4tvuKfY/EwuCkfwIYXPQz2IZlRiL+TavdgcluMn50rNjZVAEw0WU69/g0tdA==
hm8a6p4n35dquoan98hvfpnli8r7abn9.example.com.	3600	IN	NSEC3	1 0 1 -  0lverorlcjoa2lji5rik0otij3lgoj3l MX RRSIG  ;{ flags: -, from: mail.example.com. to: www.example.com.}
hm8a6p4n35dquoan98hvfpnli8r7abn9.example.com.	3600	IN	RRSIG	NSEC3 13 3 3600 19700101000140 20241202085815 29203 example.com. Cj6E/+r2VXbnEcm4KA4JYSRvcQNNEmrovedezU7caYwXZfnjfKOILPggkZ9D+rcFwJyYrf50O2Zppi9giZLg4w==
;
www.example.com.	86400	IN	CNAME	example.com.
www.example.com.	86400	IN	RRSIG	CNAME 13 3 86400 19700101000140 20241202085815 29203 example.com. utZMNhsnQBC2l8Dac5MP8+3yEo7Gp6OdherZLcbzlGmr02OwTq/nogrGyZQ9ddV8sPvxftGnaq5EiB4zJ42BKQ==
0lverorlcjoa2lji5rik0otij3lgoj3l.example.com.	3600	IN	NSEC3	1 0 1 -  9vq38lj9qs6s1aruer131mbtsfnvek2p CNAME RRSIG  ;{ flags: -, from: www.example.com. to: example.com.}
0lverorlcjoa2lji5rik0otij3lgoj3l.example.com.	3600	IN	RRSIG	NSEC3 13 3 3600 19700101000140 20241202085815 29203 example.com. nhZ1V9AbEOCP1pdiJfK+GyUCh5n+qSLLlbhc0MYnxbO4QuIRWS0UlmhjdC+oGpSFdpNQ6fWqBNQCUMXDOh5GtA==
;

DNST (in LDNS mode):

;; Zone: example.com
;
example.com.	86400	IN	SOA	ns.example.com.	noc.dns.example.org.	2020080302	7200	3600	1209600	3600
example.com.	86400	IN	RRSIG	SOA	13	2	86400	100	0	23562	example.com.	2kFYyEKySfry/PbjZEgvdhLLgbbxc5GclY/+mKmr7mB9RUjZfX+m91j79MmvryD0xxOMIKAOyFflA0zSgGLPfg==
;
example.com.	5000	IN	A	192.0.2.1
example.com.	5000	IN	RRSIG	A	13	2	5000	100	0	23562	example.com.	s636+VZ2eBqgTVp1hliXp/nD29uk7sicCFLi505mCHTBQbYk6y7IYCuLyE3HiFY89UP9WlkfkqOhrsONiYP9QQ==
;
example.com.	86400	IN	NS	example.com.
example.com.	86400	IN	RRSIG	NS	13	2	86400	100	0	23562	example.com.	zqjPZOOZqt10JYnjzdyxGHrfveNS4wxk4ssLUetLxXFt+u99do+c+lUwPBOq0pUD3LZsgVoX/dMMKUqjyFitCQ==
;
example.com.	5000	IN	AAAA	2001:db8::3
example.com.	5000	IN	RRSIG	AAAA	13	2	5000	100	0	23562	example.com.	fKkCA9MyKIc5MyrqGj/IYWfUjToHPUy26qHy2/tzHTDsfHrNWye+/jEOI6m5CtFPeB3qBXNtOrmIKV6e/qBX1g==
;
example.com.	5000	IN	DNSKEY	256	3	13	He3P9aBLDe2L9MeQfGU96jnOrULzhRVqHkYuhBLtmY19zgVdvHFcgvtMBZdns36De5hPuzD1Hhi982d1uxFcuQ== ;{id = 29203 (zsk), size = 256b}
example.com.	5000	IN	DNSKEY	257	3	13	He3P9aBLDe2L9MeQfGU96jnOrULzhRVqHkYuhBLtmY19zgVdvHFcgvtMBZdns36De5hPuzD1Hhi982d1uxFcuQ== ;{id = 29204 (ksk), size = 256b}
example.com.	5000	IN	DNSKEY	257	3	13	6W4xnMJ+f3Tzdat5635hP6KhMblsaeJDPijAqkVAotZGjXvBs5KWTyZiiXYJ/rNcAi3xf+TbQ4NOgOD7lwapaQ== ;{id = 23561 (ksk), size = 256b}
example.com.	5000	IN	DNSKEY	258	3	13	6W4xnMJ+f3Tzdat5635hP6KhMblsaeJDPijAqkVAotZGjXvBs5KWTyZiiXYJ/rNcAi3xf+TbQ4NOgOD7lwapaQ== ;{id = 23562 (zsk), size = 256b}
example.com.	5000	IN	RRSIG	DNSKEY	13	2	5000	100	0	23561	example.com.	RymmPnAu+BzQjJIwpZKpACUj0//itIxZkV/ph08MEn37Sfiq1Lv8t6leX0gDDLT8wBW1WVPD7+5VyryTPe1FdQ==
;
example.com.	3600	IN	NSEC3PARAM	1	0	1	-
example.com.	3600	IN	RRSIG	NSEC3PARAM	13	2	3600	100	0	23562	example.com.	ZdzUMxkrHM1GSczvD+F6gRUDrYGwuXMuGCHMI8YAlGzlLkppGKcGTsGnc0PqOwcAyzU1ZirgF5c3gnGe/cR/jw==
;
9vq38lj9qs6s1aruer131mbtsfnvek2p.example.com.	3600	IN	NSEC3	1	0	1	-	HM8A6P4N35DQUOAN98HVFPNLI8R7ABN9	A	NS	SOA	AAAA	RRSIG	DNSKEY	NSEC3PARAM ;{ flags: -, from: example.com., to: mail.example.com.}
9vq38lj9qs6s1aruer131mbtsfnvek2p.example.com.	3600	IN	RRSIG	NSEC3	13	3	3600	100	0	23562	example.com.	LxkH0H1jffBtz07ymGb+ABMu8SraGXs0NDX2ZxfncmwaP7/ohLs0306P7RVC7A8WKgyFfcLf3rn0vvlEJA2XgA==
;
mail.example.com.	5000	IN	MX	10	example.com.
mail.example.com.	5000	IN	RRSIG	MX	13	3	5000	100	0	23562	example.com.	lXnvzpqW/3MflMB8EowqXr+PJQS6it+z+ynd98Asdrp/pm+78CmxCgM8+OLc8KOHzeXBqCtS7w7462t+I8k/AQ==
;
hm8a6p4n35dquoan98hvfpnli8r7abn9.example.com.	3600	IN	NSEC3	1	0	1	-	0LVERORLCJOA2LJI5RIK0OTIJ3LGOJ3L	MX	RRSIG ;{ flags: -, from: mail.example.com., to: www.example.com.}
hm8a6p4n35dquoan98hvfpnli8r7abn9.example.com.	3600	IN	RRSIG	NSEC3	13	3	3600	100	0	23562	example.com.	9L4XmKPb7Z4AcctYXZHDtOPzr/42LPDeropljFFbb+GWkMQwxzfFy6wJsCUg3sNbBkyiFhwRQNsE/JyZCD8Tbg==
;
www.example.com.	5000	IN	CNAME	example.com.
www.example.com.	5000	IN	RRSIG	CNAME	13	3	5000	100	0	23562	example.com.	93RqRjuGdYodOZhmiEz7uGP6UBB4tpY5XSUqBQtnrffciakTae1f3U3IvO+ENuchgxUKUPupzDiPmczVu+VvIQ==
;
0lverorlcjoa2lji5rik0otij3lgoj3l.example.com.	3600	IN	NSEC3	1	0	1	-	9VQ38LJ9QS6S1ARUER131MBTSFNVEK2P	CNAME	RRSIG ;{ flags: -, from: www.example.com., to: example.com.}
0lverorlcjoa2lji5rik0otij3lgoj3l.example.com.	3600	IN	RRSIG	NSEC3	13	3	3600	100	0	23562	example.com.	5lO46Fh7c0/X0ECtWmXYgOb8pYPWqvP37olujorOJLbWQs+C1u5nlPXJ7Vn2pCGpeNAaMYdYrXAXs0UA5XooKA==
;

Notice the different TTL on example.com. 5000 IN AAAA 2001:db8::3.