2004 Saturn Ion transmission problems

We own a 2004 saturn ion3 quad coupe, it has a different transmission then the others. We bought the vehicle on december 31, 2003. It had 91 miles on it. We noticed the transmission seemed to hesitate a little going from first into second. When we took it in for it's first oil change in march, we asked them to look at the transmission. They reported back that it was normal for a 4 cylinder to act the way it was. Assuming they knew what they were talking about we left it at that.

I bought a saturn ion 2 in january since that day I have only got an average of 22.5 mpg that is 270 miles per 12 gallon tank (and it still continues). In march as I was driving down a back road, it lurched, the check engine light came on, it bogged down, and would not accelerate over 50MPH and was extremely sluggish, felt like I was driving a golf cart. I had it towed to the dealer. The recalls on the fuel filter and computer system were completed.