Lucky Food Find?

This is my first post, but I've been lurking for weeks.

I may have hit the jackpot at a discount store nearby, but I'd love for someone to look at the food ingredients to confirm and also tell me whether it's OK to feed my 16-week old what appears to be adult cat food. I've been reading these forums for weeks about raw food vs wet food vs dry food and all combinations of the above. I've decided what works best for me and my lifestyle is wet twice a day with dry kitten food left out while I'm at work. He'll also get a bit of raw meat a few times a week when I'm cooking dinner more as a treat than as a diet.

I found 3-oz cans of Newman's Own Organics Grain Free cat food in the Beef and Beef and Liver varieties priced at $0.69/can. Most sites list it closer to $1.59-$1.69/can. I googled the heck out of it and found most people complaining about the price and that their cats don't like it. No one seemed to be complaining about the quality of ingredients though.

I bought one of each flavor and my kitty ate it up where he typically only picks at his Blue Buffalo kitten wet food. I triple checked the expiration dates and there are about 3 months left before they all expire (which is why I'm guessing they landed at the discount store to begin with).

I just feel like there's a catch I'm missing. Here are the ingredients:

Beef
Ingredients
Organic Beef, Organic Beef Broth, Alpha Tocopherol, Ascorbic Acid, Niacin, Retinol Acetate, Pantothenic Acid, Riboflavin, Pyridoxine, Thiamine, Natural Vitamin K, Folic Acid, Colecalcipherol, Biotin, Cobalamine, Calcium Carbonate, Iron Carbonate, Zinc Proteinate, Copper Proteinate, Manganese Iodate, Calcium Iodate, Sodium Selenite, Taurine.

Calories
156 kcal per 3 oz can

Guaranteed Analysis
Crude Protein (min) 12.0%
Crude Fat (min) 4.5%
Crude Fiber (min) 1.0%
Moisture (max) 82.0%
Magnesium (max) 0.02%
Taurine (min) 0.07%

Beef & Liver
Ingredients
Organic Beef, Organic Beef Liver, Organic Beef Broth, Alpha Tocopherol, Ascorbic Acid, Niacin, Retinol Acetate, Pantothenic Acid, Riboflavin, Pyridoxine, Thiamine, Natural Vitamin K, Folic Acid, Colecalcipherol, Biotin, Cobalamine, Calcium Carbonate, Iron Carbonate, Zinc Proteinate, Copper Proteinate, Manganese Iodate, Calcium Iodate, Sodium Selenite, Taurine.

Calories
140 kcal per 3 oz can

Guaranteed Analysis
Crude Protein (min) 10.0%
Crude Fat (min) 3.0%
Crude Fiber (min) 1.0%
Moisture (max) 82.0%
Magnesium (max) 0.02%
Taurine (min) 0.07%

Click to expand...

I know kittens require more energy and kitten food is often formulated with more calories, but these seemed pretty high calorie when I compared it to other wet foods I've looked at.

Does anyone see anything I should be concerned about or should I just accept a good thing and enjoy saving some cash for the next couple of months before the expiration date?

I've been doing a ton of reading, but I'm still new to this, so please make any suggestions!