There are at least two very malicious pathing quirks in Sol A that I know about.
The first involves the area directly outside the bar in inferno complex. Right outside the door to bar (room #15), mobs in the room south of your position will agro. However, they are unable to walk down the stairs to get to you (marked with thick red line), so they head west through adjacent rooms (arrow) before looping back and attacking you from the west.
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The second quirk is in room 6. The mob which spawns at the location of the red dot, in the southeast corner of the room
doesn't like to move from his spot to the rest of the room. Instead, he will run south through the invisible wall, run all the way around, and come back to room #6 from the east (bringing anything he found on the way).
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Sol A was one of my favorite zones... think I duo'd there from 26-34. The exp and cash were excellent once we learned to manage the various death traps.