Lots of QVMS have different admin flags. For example, on my Lolards/gpp-1.1 qvm I have the same flag for !listmaps, !register, !listplayers and such, whereas other qvms may have them seperate. I someone edited mine so it's more simplified because for some reason before it had !listmaps on the same flag as !setlevel which was kinda... uhh...
Also, check for build errors. Often I forget something as simple as a semicolan [;] and the next half of the file doesn't even get compiled. I remember getting someone to find a similar problem but he put the [}] in the wrong spot and rendered the whole turret part useless as it ignored everything and without compilation errors, well I was fked for quite a while... (half year or so)
tldr: DoubleDodeca-check (12) Check your source code. If you run the source on a git repo, checking past commits are even more helpful.