Game Mechanics: Blackburrow Issues

[Nask26]

Me and a friend have been leveling here for about 3 days usually by ourselves in the zone. Randomly about 5-7 gnolls seem to just pop right on top of us. We have had it happen all over the zone. Initially we thought pathing just might be messed up and someone was training but 3 of the 5 times its happened we have been completely alone in the zone. My only guess is a repop is happening and they are falling thru the world or something? Anyone else have this issue?