There's a natural progression of these acts: Start with the blowjob, then do the kneeling position, and finish in the mounted position. It would be nice if the scoring reflected that.
Instead of being simply: Blowjob = 3, kneeling = 4, mounted = 9, it could be something more like this:
blowjob = 3, kneeling = 4, mounted = 5, but then doing a blowjob before a penetration gets a +3 bonus, and doing kneeling before mounted gets a +4 bonus. (These could be called a "progression bonus"). And there could be a variety bonus: +2 for each new act after the first one. (It could be an extra line: "variety bonus +4")
Then blowjob, kneeling, mounted is 3+4+5+3+4+2+2=23, while the opposite (weird) order mounted, kneeling, blowjob is only 3+4+5+2+2=16, and the (repetitive) mounted, mounted, mounted is 5+5+5=15. Blowjob, mounted, mounted is 3+5+5+3+2=18.Blowjob, kneeling, kneeling would get you 3+4+4+3+2=16, while kneeling, kneeling, kneeling would only get you 4+4+4=12.