first of all, is it printed correctly according to the selvedge? If it is, I think the problem is how the bolt was wound after printing and while the fabric was wet. You see a lot of this with panels. You can do a couple of things before trying to cut. You can wet down the fabric--you don't have to 'wash' but just wet it down and throw it in a dryer. That may be enough to restore the proper lines. You could also 'block' the fabric into proper alignment by taping one side to a table and dampening the fabric and pulling it back into square (according to the printing) taping all around and letting it dry.
If the printing is off, just cut with the printing and forget about straight of grain. And if the printing is off but is still skewed, then dampen and pull the printing into line, tape and let dry. Hope this helps.
Okay looked at your pics again. I would definitely cut according to the pattern and only one layer at a time.
Last edited by GingerK; 11-17-2018 at 08:33 PM.