When Max saves Liz he uses his left hand. When we see Liz looking in the mirror it'still the left hand but the silver print is on the wrong side and when we see Liz showing Max the print it's one with of a right hand.
Pilot Bloopers/mistakes
1)
At the outdoor taco stand, Max waits for Michael to hand him the tabasco, which he does; the next shot shows Michael putting the tabasco in his drink; then the bottle is gone period.
2)
Also, in the same scene, while Isabel is giving her "This changes everything" speech her hair goes from not being tucked behind her ear, to being tucked behind her ear, to not again.
3)
In the "It was You" scene, Liz's necklace is always different. It's either under her shirt, on top of her shirt, or not there at all.