I may be wrong, but I don't believe a person can say another person us eligible. I think you have to report yourself. Not a rules expert so I may be wrong. However, if that is the rule, then Allen obviously f'ed up and transposed the numbers, which, knowing his history is pretty likely. Think Lions got screwed.
That said, I question Campbell's decision making. 1. Not taking the gimme field goal in the 1st quarter on 4th and 4 (could have used those 3 points) and 2. As was mentioned earlier, once the penalty was called, your odds of making the 2 goes way down. Kick the extra point and take your chances in OT. You have the momentum.