Just do your best
I handquilt for others and I will take almost anything. I prefer no open seams, but these are easy enough to anchor as I go. I have techniques for attempting to flatten/straighten borders. The only thing that is almost impossible is a Lone Star that has turned into a volcano. My advise is to notify the quilter of construction problems, and dont sweat any unmatched points. Your quilter probably has dealt with these issues numerous times and could teach fixes if asked.