I've seen people report issues like that with my Rezound. The internal storage would go wonky and such on AOSP but ok on stock.
Tried going to stock and formatting the internal storage through recovery, and then going back to AOSP?
Yup. Have formatted everything within TWRP and then installed a ROM, still had the issues. Sadly never had that issue up till the 4.2.2 ROMs started to hit. Since no others reported the same issues, I knew it was only my device.
I wouldn't be surprised if it was cause of all my flashing. After all in the year plus I probably flashed at least 200+ ROMs on there. From nightlies to various ROMs for testing. Stock works so I have stayed on that.
Have you checked out Negri Electronics (dot com)? While their prices are not necessarily better than elsewhere, their selection is pretty good and they offer some phones not normally available here in the US. I have seen them promoted on several top tier Android sites so they are legit.
Will check them out. Not sure if the wife will be keen on me getting something at retail price again. Spent $600 on this and killed it in just over a year cause of my abuse. Was gonna try to go with Pure Android like a Nexus or just stick with stock on my next device. That way I don't destroy it in a year and can fulfill my contract.