Ever see act1 Rogue townie in Cow Level?

[Crystalion]

v1.10 uswest ladder2 game, classic, playing game after Diablo kill (you just have to rejoin the game after the Diablo kill timer boots everyone out).

I killed everything on the cow level with my Chippydin and then brought in my Find Item horking barb for grins (only player in game)... when he entered the cow portal I noticed a rogue standing nearby and did a WTF?!

After reassuring myself that I didn't have a hireling I took a screenshot (I should have brought up the party screen and hired a rogue so you could see "for sure" that the rogue was a townie).

I then spent some minutes trying to herd a chicken into the cow portal (with the expected "nope, doesn't go through" result, of course) while thinking about this.

I'm torn between thinking:

a. the game put a wandering rogue in the cow level post clear, as an easter egg unknown to me
b. the rogue got "sucked in" to the cow level due to sloppy coding and a race condition when my barb entered the red portal
c. the rogue happened to walk into the cow portal by chance

I only credit "c." as remotely possible because I've seen act 3 townie sorcs wander out into the wilderness.