Is anyone else having problems trimming to a pline?  I have a situation where I have a horizontal pline composed of line segments.  The horizontal pline is slightly wavy.  When I try to trim a vertical line to a bunch of these wavy plines (I am also trimming the pline to the vertical line) that are offset from each other, the trim is not clean.  It leaves a portion of the trimmed vertical line remaining requiring me to zoom up and trim again, often repeating this two or three times.  It doesn't happen on all the trims, but at least half of them.  Unfortunately this is an artwork that has many of these trims needed and since I can't trust the trim tool it requires zoom and inspect of every trim.

There also seems to be some strangeness with these segmented plines when they pass through horizontal zero (the UCS) with regards to trimming the pline itself.

Just wondering if anyone else has experienced this and has any pointers.