Pictures MIA in Gallery

[SCE2011]

So I keep having the issues of my photos in my Gallery deleting themselves. When I first got the phone, it was because my SD card wasn't large enough...well now that issue was resovled and my pictures and videos still do a vanishing act. Has anyone else had that issue? It happens at random and sometimes I have to delete photos once I upload them to where I want them (for example FB) or otherwise older pictures go...or sometimes newer pictures go. Very odd indeed. The Verizon guys/girls tend to look at me like they've never heard of this being an issue with the phone. Nope, it's not user error either. Thoughts, explanations, or fixes are welcome. 😃