Addons Disappearing

Recently, I booted up Garry’s Mod, when I noticed that I had like a quarter of the addons in my Q menu. I went to my addons page to make sure, and there were only three pages of the original nine. This isn’t on my desktop at home, however, so I assumed it was a synchronization error. I exited GMod, waited, and it didn’t sync. So, I verified the game cache and played again. There was still nothing there. I deleted and reinstalled GMod a multitude of times to no avail. Does anyone have a solution to this?

It’s not like there were a million thread about this already.