It was quite clear what they were trying to do. They had 58 and 68 go to the ref and one of them would report. Of course they know it has to be announced but 68 sounds like 58. On top of that, they had 70 run in who usually reports but didn't this time. From their original alignment and then their shift, I think all 3 of them were in eligible pass catching positions at one time or another. They thought they could catch the Cowboys napping since we have a history of gaffes in big moments. To boot, they said they cleared this with the refs before the game.
After all this, the NFL released a video on the rule and if you believe what the Lions say, the NFL didn't follow their own rules on reporting. The head ref avoided a question about 58 and 68 approaching him and what was said. Then this ref and crew were "disinvited" to the playoffs rotation afterwards. Those spoke volumes to me. Still, if anyone on the sidelines heard the wrong number announced, they should have pulled the plug but the refs DID mess that whole thing up and we never know if the Cowboys would have fallen for the okie doke.