How difficult can it be to design pharmacy software?

I remember when I first used PDX software back in college... I thought it was horrible. Thinking back, though, I think if I had known more about what I was trying to do it would have been easier. How many things can and should prescription filling software do? A bunch I suppose, but basically it must do a few specific things

1. Fill Prescriptions
2. Price Prescriptions, 3rd party or cash
3. Reverse claims or transactions, 3rd party or cash

Perhaps, because I've been using PDX for over 10 years it seems straight forward to me. It makes sense to me. It uses words and phrases like:

check
fill
credit return
alternative plans

With this RX30 I cannot even figure out how to toggle between cash and 3rd party easily. And what is with all this fill, fill/refill, edit? What's the difference? Who cares? Why bother..

I, also, cannot figure out how to reverse a prescription. Well, I have part of it worked out, but I want to reverse it, rebill it for cash, and over ride the price. Sounds easy, but all this fill, refill, edit mode has me all confused. The options on the function keys change based on the mode, etc... so when I think a certain option ought to appear on the function keys, it isn't there anymore or its something else.

Maybe someday I will love RX30.. but today I have serious doubts. How difficult can it be to design a prescription software that actually makes sense??? Apparently, very difficult, because not many have have succeeded very often.

Its very frustrating. Its like driving in Pittsburgh. I can see where I want to go, but can't get there. Its like the Highland Park Bridge: want to go left? go right, but of course!

Arrrghhh!