This quilt is so pretty. Don't give up. I will give you some suggestions...the top left churn dash has what look like green sashing strips. I would make the hst the same width as those so if they are 2 1/2 half then cut the hst at 2 1/2. I hope that make sense.
For the bottom churn dash... does it have sashing strips as well. If it does I would do the same with those hst as the top one. I hope this fixes your problem, if not I am sure someone who is better at this than me will chime in with some good advice.
Also, something I noticed was that on the top churn dash you have the flying geese unit on the bottom turned the wrong way.
Just take the sashing strip off and turn it around.
Good luck,Gina