If it's a custom map, it's a custom map.
Anything goes.
This particular custom map is made in two differant rfa files=your client only have half map.
And spawns behind Tank works super.
I think it's about 8 spawns on each flag, 3 are removed and put on tanks from that flag. You will randomly spawn on tank and random at flag. If you look carefully on spawnmap with spawn icon on, you will see it moves when tank moves.
Spawn icon is always in center of all spawnpoints in that group. That's how I know it works.
If it's a standard map, patchfile is the key to make it serverside.
And yes, I hate when people make custom maps and say it's SSM code on them!
It's CSM code for g@#%$&*@!d sake.