It sounds like you actually have a pretty good kilt. As Paulhenry says, both of the places that the hem is turned up at an angle is part of a well-made trad kilt. If you don't turn it up there, the back layer tends to sag down and show from the front.

Even the best tartan is not absolutely straight along the selvedge edge (the bottom of the kilt). This is not a cut edge - it's where the shuttle reversed direction for the next shot during weaving. If this were a cut edge, it would ravel. A selvedge edge will not ravel because there are no free or loose ends. If one color pulls a little tighter than another, the edge won't be quite straight. But, unless it's a terrible weave, it won't be noticeable when you wear it.

Barb