When Adam beats himself up to make it look like Gale's ex-husband Tony roughed him up, his body is covered with bruises. In the next scene in which he's shown shirtless, his body looks perfect and there's no sign of the bruises.
When Adam and Gale have sex, he has a two-day growth of beard outside on the pool patio. Then he's clean-shaven while they're in bed, and has the beard again once they finish and go outside.
When Adam meets Becca by the pool he puts his t-shirt back on but when Becca is watching him leave through the window, his shirt is off again.