Tried a different offset. Seems like the intersecting line segments which are very nearly a straight line, but not quite, are
not being trimmed by the offset command ??
It's often times difficult for intersection mechanisms to get a clean intersection on things that are very nearly tangent with one another but not quite.
That's because things like that have a kind of "zone of intersection" where the 2 objects are within the target tolerance of each other across some extended area rather than at a sharply defined point.
