Need Help Double sided printing alignment

Here we go again with a double sided headache. So i print side a and everything is fine, unload the material and flip it to print side b. For some reason its almost like its printing side b smaller than side a. As seen in the photos if i cut, not to the bleed but to just the edge of the print on a side, there is a quarter inch space of white until it gets to the print on side b. But on the opposite side, cutting again to the edge of the print, everything lines up. But at the same time almost none of the crop marks line up. Is Onyx RIP software shrinking the Side B file somehow? Am I pressing something i don't notice? Very frustrating that HP 360 advertises double sided printing but I can't get it to work for anything. Not using takeup reel. Feeding it by hand and the skew is near perfect. Don't understand what I'm doing wrong here.

 

Justification is on center. I am working from a quickset though. Can working from a quickset cause issues like that?

BlueMoonATL, I don't think so cause then both sides would shrink right? It seems like Side B shrinks but still aligns to one side? Just doesn't make any sense to me.

 

But isn't going through a quick set literally the only way that you can print double sided? Cause you have to go into the quick set to select the Side A option.

 

Ohhh okay. That would make sense, I've never really looked for it in there before, I'll give it a try and see if it makes a difference at all.

 

Yeah its the same file and dimensions for both sides it just seems like its shrinking it some how. I even measured one side verses the other and for some reason a singular piece was shrunk down by an 1/8 of an inch. So each piece being shrunk down that much is probably whats causing the quarter to half inch gap that I've been getting.

 

Tried it with the Job Editor and it seemed to help a little bit. It seems that Side B didn't shrink nearly as much but unfortunately it still did.