Rear leaf spring problem. Need help

So I just recently swapped out my dana 35 for an 8.25, everything is all hooked up,the swap went fine. But on the passenger side rear leaf there's a gap in between the top and second to top leaf. Any ideas of why this would happen? And how I can fix it? Any help at all would be great, thanks.

Check the center bolt and make sure it's tight or maybe even broken.