Listen to Lostboy. Good advice.
First, you're likely overtrained to some degree. (tired? not as hungry? elevated temp in the a.m. by any chance?) You won't like hearing this, but I urge you to consider it: Start with this...and I'll bet you won't but hey, it's worth the risk that you might hear it....take a week off. Rest.
Then get back in there and consider breaking up the week and do 2 on, one off, three on, one off.
Do all your cardio and interval training either in the a.m., then lift p.m., or the other way around. Fat is burned, and flushed out through hydration. Drink water like you were a fish. You can't target your mid-section, but you can strengthen your core, which does so much good all the way around. Don't neglect it, and if nothing else, finish off your cardio/HIIT with some ab work.
Big muscle groups need to be worked like big muscle groups - HEAVY. Period. Nothing grows if the weight isn't going up. Size comes with strength, not with endurance, so go heavy and fewer reps. Moderate number of sets.
Think about purpose/function and try to give rest between. Consider one of the following for six weeks:
M - CHEST (push, some pull e.g. flys)
T - LEGS push (not counter-intuitive to the advice, as the group is unrelated)
TH - BACK - mostly pull
F - TRI's - push
ST - BI's and DELTS - pull and push
M - BACK and DELTS (pull/push)
T - TRI's (push)
W - LEGS
F - BI's (pull)
St - CHEST(push)
Again, listen to Lostboy - get some power in your routine: squats -- nice and deep down into the bucket, both front and back squats; old fashioned bench press, both normal width and wide grip, and then when you have more strength in three to four weeks, nice heavy wider-than-normal incline bench; heavy seated rows, strict, squeeze.
Remember that deep squats, and heavy leg work actually helps elevate your Testosterone, and will naturally have your body working for symmetry, as your upper body will respond in relation to the growth and effort being put in on your legs.
On smaller muscle groups make sure to get a good stretch, and flex the opposing muscle group (e.g. when you are doing push-downs for Tri's, when at the top of the movement, flex your Bi's, then push down and come right back up and flex the Bi's, feeling the stretch deep in your long head of the triceps. Go deep on shoulder presses and power up without locking out to rest too long at the top. Keep a pace going.)
Protein after a your workout within 20 to 30 minutes. Liquid is fine, so long as it's almost entirely free of soy. Add a banana or peach or something with a good glycemic index, and then combine foods like almonds and low-fat protein's with greens and legumes throughout the rest of your five meals in the day. And don't eat within 90 minutes of going to bed.
Finally, it never hurts to spend a couple of hundred bucks for a week with a good trainer to set things straight and get you started on something to shake up the routine.
Stick with it. You'll see progress.