Intentional, Personal, or Common?

[Da Official]

These situations were brought up and I wanted to bring them to the boards to get the right answers:

1. Situation: 30 seconds left in game, score tied, the ball is at the disposal of A1 for a throw-in, A2 sets an illegal screen on B2, official calls a foul on A2.

What type of foul do we have?


2. Situation: 30 seconds left in game, Team A up 1 point, the ball is at the disposal of A1 for a throw-in, A2 sets a legal screen but B2 does not react in time and crashes into A2 knocking him to the floor, official calls a foul on B2.

What type of foul do we have?
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My understanding of the rules (4-19, 6-1) leads me to believe Common foul in both Situations. What is the correct ruling?