It also seems to be doing this with the east sector, right through the agility shortcut. And it occasionally does some strange things in the south-east sector, like mining an obstacle rock, running out, then running back in and restarting the cycle of veins. I've also noticed a few other things that add to it's 'botlike' behaviour such as very inopportune use of the dragon pick's special, such as when I'm standing @ the hopper. Or when I have it set on bank deposit box, it runs besides the box (to a tile you can't access it from, making your character move from beside it to infront of it, causing it to look VERY botlike after it happens several times). Also, despite tinkering around with the settings, I can't seem to get it to repair struts. My character just stands there while I wait for the exp drop to register, at which point it starts working again.
If it sounds like I'm just doing anything wrong, please, any information would be very much appreciated! If not, I hope some of this information can help!