Plot hole: There's too much bruising on Paige's arm in the original timeline, given that she only had one injection given to her by a med student (on the day of her death). She doesn't appear to have had any previous injections when Tru looks at her arm in the second timeline
Plot hole: The first time the day happens, Paige is quickly identified as the victim of a drug overdose. However, we find out later that she actually died by violent strangulation. Yet the only sign of trauma on the corpse was minor hemorrhaging in her eye. There should have been obvious signs of the confrontation, starting with huge bruises on her neck.
Plot hole: Why hasn't Tru met Luc? He came to the morgue very late the first time the night happened in the previous episode, after Marco scared Tru. Even though Tru seemed to stay at the bachelor party very late the second time the day played through, she had gotten into work by the time Marco tried to scare her again, so she should have still been there when Luc came in.