Beautiful quilt. I admired it twice as I gallopped by on my horse. BTW, I don't see any mistakes. Remember this isn't a museum piece (I mean this in the kindest way); it's a hug from mother and aunt to daughter. I guarantee you when you give it to her (and don't even mention the part you're unhappy with) she will think its the most beautiful thing she's seen in a long time. Relax and enjoy the sentiment of helping your sister give this to her daughter.
Darren