I can only commiserate. I'm working on my second quilt and having some of the same problems. (Thankfully, they are all squares and rectangles.) I'm really looking forward to the next quilt, as this one is better than the last one. I have only had to redo 2 squares, but had to rip out and resew several to minimize the seams so they would fit well. My "mentor" will look for the matching seams. Of course, she's 86 and has been quilting all of her life. She's really good. Her hand sewing and quilting is so even, you would think it was done on a machine.
Thanks, Ladies, for all the tutoring.
bkay