Other mistake: The bottle of alcohol (whiskey?) and glass on Morgan's bookcase appear to be the same as the ones the Game Master has in his office; the bottle is emptied to the same level (too similar to be a coincidence). (00:03:23 - 00:06:57)
Continuity mistake: Although the amount of alcohol remaining in the bottle had been slightly reduced, the reduction was too negligible to have filled the Game Master's glass to the level shown after his telephone call to Sienna. (00:06:57 - 00:08:46)