You are using this https://forums.alliedmods.net/showthread.php?p=611953 with no problems ?
For me there's a bug, The sm_respawn_time Cvars I set get overridden back to default 10.0. Only way to set custom is to use rcon with sm_cvar sm_respawn_time_blue "2.0" for example
Just because you don't understand how something works doesn't mean it's a "bug". And I can't help you any further. Maybe browse the forums to get a feel for how Sourcemod works?