OH PFFT DERP.
I goofed and it started outputting the Client ID for the display points instead of the actual points you'd be getting. Don't worry though, you are getting the correct amount of points. I was going to change it so it would say "Incapped + x points", but changed my mind and forgot about the client id part in there.
PrintToChat(attacker, "%s Incapped Survivor + %d points", CHAT_PREFIX, client, GetConVarInt(p_Incap));
CHAT_PREFIX displays the %s part at the beginning to show the [GC] part of text, next the %d part would have shown the "GetConVarInt(p_Incap)" part, but is showing the "client" variable instead. I'll fix it.