Personal Foul Question

[stmaryrams]

Happened in a game I was watching and wanted the NFHS call. In overtime, Team A first and goal inside the five runs a play and is stopped for little or no gain. A personal foul is called after the ball is dead. Ruling on the field was as it was a dead ball PF, ball is placed half the distance and the down is now second down. It really seemed to mix up the team A coaches a bit as to the down. Team B eventually held. Quite a good game as Team B got out to a 40-10 lead before Team A tied it at 52. Thanks for your help with the explaination.