GrammaO,
I know how your feel. I am a fanatic about points being right & it bugs the heck out of me when they are not. I have learned to measure each block when I finish it all the way around and that way all of them start out right. If you trim one & make it a correct 1/4" S.A., then it might be shorter for attaching the next block. You can hopefully move your needle over one click to the right or left to get a more accurate seam.It takes a lot of practice to get consistant seam allowance with point correct. Now there are times that some points have the 1/4" taken off, but most come right to the point. I know I will never make any $ by fixing others, so I just do that to mine. It is the "what Mother taught me" syndrome. Most don't worry about it.
Peg-TX