Yeah, it's pretty messed up, however if you wish to have the 1v1 creature spawned you can manually add it in creature_template with scriptname npc_1v1arena
Will it spawn on it's own? I just hope that using 1v1 system won't increase the conquest points cap so people would buy weapons faster, after gathering 7,8k of conquest points and reaching 2,2k rating. Those must be restricted to 2v2, 3v3 and/or rated battleground systems, as it should be