I can see the logic of 2 points max indeed this season. That would take us to 8 for the season and under the 9 points in case of administration which would make sense as administration is a lot worse financially than breaching psr.
I don't think that argument will land because it's two separate charges. All they've said is one PSR charge shouldn't exceed the 9 points for admin, but that wouldn't apply to multiple ones landing in the same season.
A more plausible angle is that you shouldn't receive two points deductions in one season on what is by definition an annual offence. There's the popular argument that we delayed the first charge and so that's our fault but I think it's a rebuttable argument - we were charged in March, the PL asked if it could be done by May, we said that wasn't enough time for due process and, crucially the IC agreed with us. So it was delayed til this season by the IC themselves.
They held our argument to be correct, and if we raised a point that was correct I don't think they can take negative inference on it later. The blame for our first charge being delayed til this season lies with the PL as their rules (now changed) meant charging it too late in the season, as the IC held. So in actual fact it's the PLs fault we have faced two charges in one season.
Then of course you have all the double punishment arguments about the previous seasons but that's been done to death.