They were not mistakes. Dallas meant every one, real penalty or not. He was biased.
He never gave the late one that actually was a penalty, as he did not want the distinction of holding the world record. That would bring far too much scrutiny from folk outside this biased/scared wee bubble called Scotland on him and his standside linesman, as to why the actual feck fouls in the outfield, turned into penalties. The spotlight would also have been turned on the corrupt SFA for not taking action on certain officials and players. As it is, abroad this is a curious wee story about funny wee Scotland.
After a couple of years of Referees actually not giving The Rangers International decisions they probably should have, since Gerrard took over and started moaning about Refs, 'some' are reverting to 'type' or are scared of reprisals.
Shhhhhhhhhhh