OMG. Just join another jump server. If you want the command to not be killed when shot its:
cvar_set nokill 1
1 is nokills and 0 is kills on
And join OBS? That happens when you change the map. Just when u change it make it "DM" or if u use the console make it "newmap dopjump DM" to make it DeathMatch. I personally still advise you to use a Jump Server already up.