Eh....this is starting to get confusing :) The referee never signaled to show he was playing advantage so the fact he gave the foul means it should have been a peno as it was clearly in the box.
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I believe a penalty over-rules the initial advantage.
Ref wasn't going to give a peno anyways cos he had money on a Harps 1-0 win!!! The fact that he cocked up and gave a free instead of a peno and then from the free in, we score and he sh!tes himself again and realises his bet is gone he gives a free out!! Thats my explanation over this whole thing!! :D