Although the distribution amps are 8-circuit, not all outputs are in use. Several circuits are capped off with 70 ohm terminators.
Let's see what circuits were run.
Upstairs - 3 to bedrooms and 1 to living room.
Downstairs - 1 to Den; 1 to office; 1 to ham shack; 1 to garage; 1 to test bench.
Outside - 1 to hot tub location.
Total 10 circuits; all within reason and logic, I suggest.