You got it on ice quickly and it was hung in the cooler: Can't figure out what went wrong unless the processor gave you the wrong meat.

One should cut the hogs throat soon after killing and allow it to bleed out. This is important if the hog was shot in head.
If the bladder or intestines get ruptured while field dressing wash the carcass out with a lots of water. One should do that anyway.

i hose hogs down well before field dressing whenever possible. If you want to skin the hog, do it before field dressing, if possible. A warm hog skins out easily: A cold hog not so much. While skinning be careful not to get hair or dirt on the meat.

Hang the hog. i prefer to hang them head down. Others hang them head up. Cut around the rear legs above the knee and skin them out. Cut around the front legs. Skin out the rear of the hog. Cut the skin all the way down the animals belly. Then use the knife as needed and pull the skin off the hog. A big pair of pliers or channell locks makes it easy to pull the skin off. Skin out the hogs neck and front legs and cut the head off.

Field dress the hog. Wash out the cavity well with water. After field dressing a skinned hog i like to put a big plastic garbage bag around the carcass before cutting it down. Have someone support the hog while the rear legs are cut loose.

One must be careful with hogs in hot weather. When the temperature is 80 degrees F one has about four hours to get the hog on ice or in a cooler, otherwise it will start to go bad.

This tool makes skinning easier.

http://www.sportsmansguide.com/net/c....aspx?a=588020

Hog skinning video. This guy makes it look easy. Fat hogs are easy to skin:

http://www.youtube.com/watch?v=FRsYk2D82cY

Good luck with your hog hunting. Get them hogs.