Why is Sheary and Dumoulin getting paid what the other should be on? Also why trade out maatta and bring in hamilton?

The assesments I've seen had Dumoulin at $2.5 and sheary at $4. I think it's a bit hight for Sheary so I dropped it to $3.5. Calgary's defense is all right. We need a right and can afford to lose a left d. Besides,Hamilton is much better than Maata. Bigger, stronger, faster. A better skater, better shot, just all around better. I don't think Calgary makes this deal in reality. No one in thier right minds gives up Hamilton for Maata, but I can dream.