unable to factory reset after having twrp and roms installed..

Does anyone know what is wrong here? I wanted to get back to stock by flashing Amazon's stock .bin (changed to .zip) in twrp. I've done this before and had no issues. In twrp I wiped everything and then flashed the .zip. Then I booted into the Amazon OS and everything appeared fine. I'm on 14.3.2.5. For one, I cannot factory reset. After trying to do so, it reboots to the Kindle logo and just permanently hangs there. If I try to update it manually to 14.4.5.5, once again, it just hangs on the Kindle logo. It appears I have no recovery or something. What I don't understand is that I've done this in the past with no issue. Where I am now is that I am able to boot without issue into 14.3.2.5, but cannot update. What can I do?