Oh my that is pretty! Sooo sorry about your troubles with it. Have you figured out where did those dratted measurements went awry?? What size bed were you making it for? And I never heard of an iron blowing up!!
The quilt's extra length could be taken up by tucking it under the pillows. And if you use a bed skirt it might not be too narrow.
Or if you wanted to make it shorter, you could cut the mountains and top border(s) off, leaving a couple inches of either the green or the purple. The pillows will cover the top edge anyway.
I think you did a great job!