I have a 24' round solar cover and there are seams - it would seem reasonable that it would be difficult to make the material too wide in terms of handling etc.

As long as the seams do not look like they are coming apart, that should be normal. My cover bunched up until I trimmed it to fit the pool. When it lays out in the sun, that should also help it flatten out. It was probably rolled up pretty small when it was new so it will take a little time to work out the wrinkles from where it was folded.

Peter