Official server running nsl map?

Was playing last night, came across something odd. Had been on an official server for a few games, even checked hive and those games were logged, then at map change it switched to the nsl version of summit. I didn't care at all, just thought it was pretty odd for it to randomly pop up on an official. Anybody know how or why this may have happened? Really I'm just curious.

Also, not sure where this post belongs. Mods feel free to move