1. Watch the casino scene where Trent & Mike sit down at the $100 table. (first 1/4 of the movie)
2. Watch when Mike makes his $100 bet using only one black chip.
3. Then there is a shot where his cards are shown, and you see there are two black chips, but he has only bet one.
4. When Mike "doubles down" on his bet, the cards are shown again with one black chip, until Mike doubles his bet and places a second chip by his bet.
* This appears to have been a mistake in editing.