2 questionable calls

[Greyhounds30]

2 questionable calls in a JV game last night:

1) Kickoff team kicks a high 20 yard kick, recieving team runs deep and nobody is near the ball, so K catches it in the air. Interference was called. Is that correct?

2) 2nd and goal on the 6. Team A runs the ball for no gain but unintentional facemasking is called. The penalty is accepted and half the distance was marked off. The next play was ruled 2nd and goal again from the 3 this time, is that correct that the down is played over?