Tennis scoring macro

The sheet called "Logscores" is exactly what i want, however. I want to create some formulas based on the values in here yet if i start new game it will no longer work and the formulas disappear.
Essentially what i want is to have the scores in running so something like this:
If games = 1, then my formula will return the values in those two colums: CumPoints-A & CumPoints-B.
This would continue as the game continues, so i would have a list of Game 1, Game 2 etc etc and the points scored in each. I would like these formulas not to need changed so when i do clear results and start a new game they remain.

Any ideas?
Cheers.

1.Test the attached to see if your formulas remain intact.

2. After more than one game, I am not sure what you want. Do you want:
- value on each row to say GAME 01, 02, 03... up to end of match
- value on each row to say SET 1, GAME 01 ... to end of set1, SET2 GAME01 ... to end of set2

3. Would it help to have a worksheet summarising points by game?
or do you prefer everything in the same worksheet?