Strange behavior when deleting elements

The elements under the table are removed when deleted. However, the items in the table remain.
The elements in the table can be pulled out again. If these are now added again, no new element appears, but the old ones can now be deleted.

If a new element is added, sorted into the table and deleted and an element with the same name is also added and sorted into the table, the old element can be sorted out and with the removal of the new element the old one disappears.

If there are two element under the table but there is only one to delete above, both will disappear. If there are two items to delete, only one will be removed.

[almahdi]

I am doing a complete rewrite for this project. I will make sure to address this behavior.