it is normal. i thought the same thing of my funtana cowl before i put it on, but when installed it looks fine. matches engine spinner backplate perfectly. Looking at the plane, you dont notice the crookedness, they are made that way, dont trim it. If you trim it and make it straight with the plane your spinner backplate will have a GREATLY NOTICEABLE gap on the right side. leave it alone and put it on, you wont notice it!

sean