Android - New build, but nothing changed.

I have built an .apk and loaded it to a dev. phone... Worked no problem.

After a few significant changes to the game, it's time for another on-the-phone testing,. This where the issue occurs: When I build a new .apk and install it to the phone, the game has not changed. Everything is exactly the same as the first .apk build.

I have cleaned the solution, removed the old .apk files from the output directory, uninstalled the old .apk from the phone, re-added all the appropriate scenes to the build manager, and every time I build the .apk and load it to the phone, the game is exactly the way it was on the first build.

I am baffled at this. The logic makes no sense as to why after so many changes to prefabs, scenes, and code, everything looks and operates EXACTLY the way it did after the first build/install.

I've confirmed that I am uploading the correct .apk (not the old one, i deleted those after transferring to phone) by creation timestamps and file sizes. Unity is actually building a new .apk when I tell it to, it's just the old version of the game. I don't even know where it would be getting the resources for it to compile into that build since many of them have been changed, and some even removed from the project.