Hi Sheri!
I have great news for you! Yes, you can use your Table Service Credits anyway that you desire during your vacation. You can use 2 or 3 Table Service Credits one day and none on the next day or you can use all Quick Service Credits the next day.
I am assuming that you are purchasing the 2013
Disney Dining Plan which includes for each night of your package, for each Guest in your party ages 3 and up:
1 Table-Service Meal
1 Quick-Service Meal
1 Snack
This means that everyone in the room has to have the same package, but it is up to you how you choose to spend the dining credits. For example, if you have 4 people staying for 4 nights with a dining package, then when you check in to your Resort you will have 16 Table Service Credits, 16 Quick Service Credits, and 16 Snack Credits to use during your stay which are good until midnight on your departure day. So one day you could choose to eat at 2 Table Service Meals or any combination that you desire until your credits are used up.
I hope you have some amazing dining experiences at Walt Disney World on your next trip!
Keep Dreaming Big!
Marc