If you are converting 1 mod at a time, then you need to rename the VPKs we give you to something unique for each mod.
We are converting your mods to a signed VPK containing your mod. If you keep replacing the vpk, only the last mod you converted would load.
I don't see what the issue is. sv_pure 1 doesn't block everything obviously, it only blocks things that usually cause cheating like maphacks. By signing your mod with us, we allow you to load these mods on our server even if it is set to sv_pure 1.
Maybe there is an issue with having unsigned mods and signed mods in the same folder?
If you are afraid of revealing something, then pm me what you did.
I am really curious as to why so many people are having issues with this. It should be really simple to use.