Which size rear tire on a foreman

I just bought two 09 foremans last weekend. Love them! I bought a set of swamp fox plus tires and itp ss212 wheels. I got them from the dealer, which was a better price than mail order because there was a mess up on my bikes not being at a store 45 min from my home and having to drive 5 hours to get them. Anyway, to long of a story. After I got the tire wheel kit in the truck, I noticed the tires were the same size front and back. 26x9-12. Is this norm? I looked and swamp fox plus also comes in a 26x12-12. That seems like what should go on the rear...??? It looks fine with the 9" tire on back, but may lack some floataion? Should I resell the rear tire to a buddy, and get the 12", or keep them? Anyone run this tire???? Thanks

Shawn