Because ANY house with a 2-player mount introduces an exploit.

Like I said, I'm not done with them but it's going to remain like this until I find the time to comb through all the code.

You guys have no idea what sort of mess these mounts have caused, and they were never really properly addressed. All this did was add more work load to staff who constantly have to deal with reports of wall glitchers, and make releasing new stuff a bit of a pain because instead of playing properly people just glitch over. Then you have the levels themselves which are an absolute mess because you have to sprinkle blocking NPCs over everything, and then there are anti-glitching NPCs that were scripted just to tackle the issue.