HMC830 NC pins

I use 2x HMC830LP6GE on a radio design.

The Datasheet recommends to connect the N/C pins to Ground.

However, when I look at the schematics of your eval board, some of of the N/C pins are connected to VCC1 and other voltages.

I am on layout now and I need a quick answer.

Please advise, Teodor