Mine wasnt folded either, but I didnt discover it till after it was installed (of course).
After the install I noticed that the empeg was very rattly, especially over potholes, rumble strips, speed bumps, curbs, hydrants, etc. etc.

I sent an email to carsupport@riohome.com and got a reply the same day from David Moss. He put a non-defective sled in the post, and I got it about 3 days later.
I swapped it for the defective one, and mailed it back (the return address was US domestic so I didnt have to deal with overseas shipping :-)).
The new sled is a much tighter fit. No rattles at all, and the unit "snikts" into place perfectly.
If you have a defective unit and your concerned, get it replaced.

Z~