Roblozs, we're trying to explain, it's not ULX setting them.
ULX (Xgui in this case) simply looks at what's already set in memory, then displays it or allows temporary change of it until next server restart.
You likely already have another cfg, gamemode or addon setting those two convars to opposite what you want.
Check your server.cfg for duplicates? I've done that before. Have same one twice.
Did you actually edit the server file, and not your local client? I've done that before too.