Too lazy to try to find the truth, but both statements are lacking context, including exactly when Iowa inquired about the Boys & Girls club thing, or whether there was an opportunity to purchase the tickets at full price. Iowa just cancelling because they found out it was for a rival group would be petty af, but that’s what makes college rivalries great.
According to Iowa the order was made by "an Illinois Chapter of the Boys and Girls Club." I find it very hard to believe that an order for an out of state boys and girls club, which happens to be from the state of the team you're playing, didn't raise suspensions when the order was made in August. It's certainly plausible but not likely.
If we take Iowa at their word, there are two scenarios in which they could have found out either this week or late last week. Scenario one is that whomever is in charge of that group, at the Iowa ticket office, called them to take care of the last minute details you would need for a group that size and discovered something was up then. Scenario two is much more simple, someone from Orange Krush was running their mouth on the internet and someone affiliated with Iowa saw it.
The dumbest thing about what OK did is that the price for the tickets would have been the same if they were with orange krush or boys and girls club, there's no NFP discount for a Saturday conference game. OK lied because they didn't think Iowa would have sold them the tickets if they were honest, and they very well might be right. If Iowa told them no, in August, they could have just picked another road game. If Iowa really wanted to be nasty, they could have waited until OK got here before they told them they weren't getting the tickets.