Why did the Chicken...

I put a chicken pot pie (the boxed, generally scary and fattening kind) in the 400 degree oven. I forgot to set the timer. Looking at the box to review the cooking instructions, I noticed the list of ingredients was as long as the box is square...
Upon reading I came across the following:

"Cooked chicken (chicken meat, chicken, water, salt, sodium tripolyphosphate), carrots, potat--"
Hang on.
My brain caught up to my eyes and redirected them to the sub-ingredients of this so called 'cooked chicken.' Can you notice and/or answer the question I then asked myself?

"What's the difference between chicken meat and chicken?"