How do these cards interact?

Double the force icons on all friendly vehicle units committed to the force.

Each enemy unit committed to the force loses one force icon.

Would it change based on whose turn, or just do both calculations on the base number?

FAQ page 4, 2.11

All adding and subtracting before doubling effects.

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glad this is here cause this happened to me today with deadly sight being played as well

And if You hace two green squadron mobilization objetives out?

Do You quadruplicate icons?

And if You hace two green squadron mobilization objetives out?

Do You quadruplicate icons?

You double and then double again, so yes, they will quadruple.