Okay -
First, can you grab a pic of the screen showing the current high score that you're trying to beat? (There IS a reason I'm asking for this..)
If you can't get one, fine, then do this:
1. Do a factory reset. (U.8)
2. Set your desired High Score values. (A.1.09 - A.1.12)
3. Set A.1.05 to FIXED.
Do not change the reward, and be sure you're setting the standard HSTDs, and not the backup (buy-in) HSTDs.
Do not leave A.1.05 on 'Auto %', UNLESS -
You set A.1.07 to the desired value, and *ignore* A.1.09 - A.1.12.
--Mike