Im not sure how many random routs there are... 3.. 4 ? Mayb something like that, but every now-and-then I hit this one.
Its 2 areas in the left path along the wall (ones in a shanty room) up from the area you start the 'race' at. Other 2 are in the back area and there is a lone one in the middle of sorts, near the steps leading to the lookout-post.
If you scan that one, it wont register as being scanned. Its a bit annoying and a nice drop in Dil for the full 3 part run he has you do.
I took a screen shot of the area and a map overview of the spot, my marker is at the bug'd spot on the map:
http://img35.imageshack.us/img35/8657/mz2y.jpg
P.S. Still need more testing on this one but the Creature fight outside of Paradise 'Lost' where you activate the Seismic Thumpers, mobs will stop spawning before the
countdown finishes making it impossible to hit the 40 max kount. I tend to try to goto one that I think hasnt been used if thats the thing triggering the glitch.
-V