Oh, Delta (Rant)

I'm taking a trip out to Seattle to see my cousin, Cody, get married. I'm flying Northwest Airlines, but some of my flights were operated by Delta. Today, the flight (Delta) from DSM to SLC got canceled and my itinerary was replace with the following:

Fri  4SEP Delta 6151*          LV Des Moines, IA    (DSM)  730A Coach
                              AR Cincinnati, OH    (CVG) 1014A
         *operated by Freedom Airlines Inc
Fri  4SEP Delta 1424           LV Salt Lake City, U (SLC)  830A Coach
                              AR Portland, OR      (PDX)  922A
Fri  4SEP Delta 1419           LV Cincinnati, OH    (CVG) 1225P Coach
                              AR Salt Lake City, U (SLC)  212P
Fri  4SEP Alaska Airlines 2142 LV Portland, OR      (PDX) 1030A Coach
                              AR Seattle, WA       (SEA) 1120A

At first glance, I was happy that they still had me getting into Seattle at 11:20am, as I have plans for that afternoon. But, upon closer inspection, they had me getting into Salt Lake City at 2:12pm and leaving at 8:30am.

My question is: How do things like this happen?

Fortunately, Northwest Airlines was able to fix my itinerary with a phone call, but, seriously . . . if this is what I should expect from Delta, I'm not excited.