Arria 10 M20k block usage- More block with less memory bits?

Hi, no I can't send the design it is proprietary.
Can you point me to any Quartus reports or settings that might shed some light on this?

Another point of information. If I further reduce memory usage to 30,466,048 which is a reduction of 2,495,320 it is suddenly able to fit and uses all 2131 M20k blocks. But somehow the design with 32,961,368 bits needs 2845 blocks? That's a difference of 714 M20k blocks or 14,280,000 bits but I only needed 2,295,530 bits.

This is really not adding up for me.

Thanks again.