My CF serial numbers don't match. Not a big deal to me at all, but what caught my eye was, the numbers are only 4 digits apart. 10080 for the body and the head is 10084. Is this a case of the factory making a swap ? I find it hard to imagine, that someone else did it and just happened to have two games that were only 4 digits apart. Is there any past history on stuff like this ? Thanks.