I've been reading posts about people buying non-Jenny food in order to try and save money. Am I to understand that we don't have to buy every single meal through Jenny while on the program? I know I didn't buy a dinner once because I was going out for a birthday party, but if I could, I'd have my own breakfasts.

You can do "meals on your own" when you want--just talk to your consultant so you're sure you know what the exchanges are. Breakfasts are probably the easiest meals to do, so you should be fine.

I've been doing my own breakfast for well over a year. Six months ago I started doing my own snack as well. I'm also down to three days of food instead of five. With my finances that's all I can do.
Breakfast is Bran cereal with dried cranberries. Snacks vary between popcorn, rice chips, rice cakes or just a couple of slices of bread