Q. about Family system

If you outlevel your senior, will your senior's senior also get half the rep?

e.g
Player 1 - Level 40 <Senior's Senior>

Player 2 - Level 15 <Senior>

Player 3 - Level 16 <You>

If you level up, and your senior only gets 120 (Half of normal), will your senior's senior get 60 rep or 120 too?

The senior's senior will also get half of what he normally would. In your example: 60.