Understanding why my matrix resets to 0.

[brutal-orange]

I'm new to the world of matrix transformations. I'm trying to build a resizable/draggable/rotatable/scalable item all-in-one. The initial movement of the item works, as seen in this CSB (drag the box using the handle, let go, then drag again), but every time I re-drag it, it resets. I've dumped and checked the initialElementLeft and initialElementLeft + offsetX multiple times, and even though they look correct, my matrix resets to a translateX of 0 + offsetX.

What exactly am I doing wrong?