So, here is my suspension at full droop. You can see the center of the bump stop pad is roughly 2” from the makeshift plum bob.
Full compression is lined up to the center of the pad.
I don’t see how it could ever get near 10” of front to back movement. The bars that go from the cantilever to the axle wouldn’t work on that either. The further drooped, that bar moves back. I’m real curious to see what your setup looked like to react that way. Do you have any pictures?