Hope this isn't too late... but - sometimes it's tricky to get the shape you want on the hem line. On some things it all just goes askew! So, I've found it's best to get the line you want with inches to spare rather than... *sigh*-don't even ask.
(If you don't need to ask.. because you now know.

I may well be able to help, so feel free to ask about That!! )