Illegal Numbering

[Simbio]

Last Friday, I was LJ. We had a call that I've never had to use in my 5 years, and I don't think anyone on the crew ever had either. We had illegal numbering, meaning the offense didn't have proper jersey numbering on the front line. For some reason, the umpire and ref thought to mark it off from the end of the run, which didn't seem right to me and I stated that, but was overruled. At half, everyone concluded that it should've been marked off from the previous spot. I haven't checked the rule books on this yet, so I thought I'd throw it out here for discussion.Is it a live, or dead ball foul, is it only 5, and isn't it supposed to be marked off from the previous spot.