We discussed this before, I think. This is a compromise decision by the club. People with more seats deserve more rewards, and they get more points. So far so good. The issue is if you let people combine points, people with 1-2 seats could almost never win a bidding contest. Now that's not necessarily unfair, either. I think this is an issue where either choice is arguably justified.
I do think there should be one exception that would definitely allow people to combine points in the specific circumstance where they drop seat(s). As it is, they just lose any unused points and that seems wrong. I think they should be split among their remaining seats.