I delt with this too.. I had surgery on on my right shoulder. The muscle atrophied a little and at first I couldn't feel my right pec squeezing. Very annoying lol. Whenever I do chest I try really hard to focus on keeping both my shoulders in the position so my pecs are stretched, expanded...
Seandh is right. You diet is really not going to give u the results you should get.
You need more lean meat. Clean carbs and veggies. Lose the big bowls of cereal dude. What's it for? U could be filling your stomach with more beneficial foods. Seems like a lot of milk too which will pretty...