It would be great if the game didn't path me onto the teleporters. Or the visible traps. That would be pretty great, just saying.
I haven't ever moved on a trap when using the mouse (although I stopped using it to move ages ago), I agree that being placed on the Displacement Glyphs is annoying.
Yeah, I don't click-move anymore, but when I did (mostly during 1.08, maybe it changed in 1.09?) it never made me move over a trap.
I misclicked, and it sent me into a mysterious portal while I was on level 2. Last time I checked you don't walk over traps though.
It's done it to me twice with visible traps - one with a blade trap on level 2 (fortunately, that was fairly inconsequential) and one time with a thaumite nest that I had placed (not so inconsequential). Paths over displacement glyphs constantly.
I remember getting into trouble in trapped areas, since the path finding had a tendency to choose a horrible route ^^ (one of the main reasons I stopped using it). Anyways, its probably a bug on your end, and should probably be submitted to a bug related thread, or wherever bugs and such are commonly discussed (I am not quite sure.. since I am not interesting in bugs that much).
Seems to me, IIRC, that it won't path you over a trap unless you've picked it up and put it back down. But it does do that.