The R was wrong to assess 3 Ts to Team A. As Tony said, the initial change gets a T, and then the rest are "freebies". Additionally, even if the R
had been correct in giving the 3 Ts to Team A, s/he administered the T's incorrectly. You only shoot the T's that
don't cancel out. So in your case, since Team B also received a T, they would only had shot 4 FTs; Team A should not have shot any FTs.
Hopefully, at the very least, the R did not add all 4 Ts to the team totals for each team. These are indirect T's and do not count toward the bonus.
Not a good way to start your day.