First question: are you weighing your meat BEFORE cooking, or when it's cooked?
I ask because meat shrinks when it is cooked - 5oz cooked meat is really more like 6 or 6 1/2 oz raw. The phase 1 protocol sheet that is most recent (from June 2012) states that we should be eating 8oz real meat protein every day, measured raw.
You can split your protein up (have some earlier in the day and the rest at dinner) if that makes it easier for you.
Regarding your losses, you are actually right about where you should be. It's VERY common to have a much smaller loss after a big loss - also you may find that some weeks you lose inches but not pounds, so make sure you and your coach are doing measurements as well as the scale.