Increase to 12 blocks daily and pay close attention to using favorable veggies and fruit for most all of your carb. If you still find you're hungry after meals, judge the hunger at 4 hours after the meal and adjust according to Zone rules (focused hunger, add 1 C block to meals; unfocused, drop 1 C block from meals).
Yes it's fine to arrange meals and snacks in a pattern that works for you, as long as you follow the Zone rules for timing and balance.
Yes, eat P, C and F in you appropriate balance at each meal and snack. The optimal thing to do is to eat a snack prior to exercise and a meal or snack after exercise. If you’re eating your appropriate daily P requirement and find you're lacking energy during workouts, additional fat added to meals will usually help (double the fat blocks you add to meals).
If you'd like to post your typical meals for a day, and let us know which type of hunger you have, focused or unfocused, I'll be glad to take a look and make suggestions.