In the game I played against cdlee today at 5:43pm, the system incorrectly marked 6-7 stones in the corner and along the side as seki, and the 8 points of territory they surrounded as dame. It was on a 15x15 board but w's stones were exactly like this (the "seki" was the upper right stones): 

http://ps.waltheri.net/719929

It's not clear why this happened, because the position doesn't involve anything close to a seki.

Why did it make a mistake like this? And is there a way to correct the system? If not, there really should be.