Latex 315 Didn't Print Overlap. Color Band Issue?

You're going to have to reprint every other panel with wider overlaps to salvage this job. You'll have to run a 60" roll probably to achieve this though, but at least you'll only lose half your materials... You will also have to print the color bars on the wider media you reprint the new panels on to get the same colors.
I'm not sure on exactly what your rip is showing me there for overlaps as my rip is different, but I don't see anything that tells me 100% that there is 1" overlap on these tiles?
Either that or your tiles are too wide for the media minus the color bars and the sides just got "clipped".

 

Wow, dealers are doing a crazy poor job educating their customers on their equipment!

 

Why use color the color bars on a full color print? I only ever turn that on when I'm doing something with like 80% white space and few colors.

Also it looks to me like you tiled the print before sending to the RIP, and possibly have something set that cut off those inside edges. Just send the whole image to RIP and set your tiling there. It's pretty much foolproof.