If there is more then one officer on the same hex - i.e. 2, do all units on the hex get +2 cover against suppressive attack?

And if a squad contains 2 officers, does it get +2 to movement?

I would say no to both questions.

Grand Stone said:

I agree. Only multiple elite figures give you more cover dice against suppressive fire.

We play "no" to both.

Determination: A squad in the same hex as one or more [it doesn't matter if it's one or more] officers receives +1 cover against suppressive fire attacks.

Increased Mobility: A squad containing at least [but it could be more] one officer receives +1 to its movement value.

Good questions. I re-checked the rulebook and the answers are pretty clear on p39:

Determination (+1 cover against suppression attacks) applies where the hex has "one or more officers" and

Increased mobility (+1 movement value) applies when the squad has "at least one officer".

From this I would answer "No" to both questions.