In the recap videos before the actual episode starts when Prince Charming and Snow White are saying goodbye, the scar is on the left side of his face even though all other scenes show the scar on the right side of his face.
The Storybrook part of the episode takes place within a couple days after Emma helps Ava and Nicholas. While helping them she says that it had been a month since she had come to town. Abigail however thinks its possible that she is pregnant. If it had only been less than a month since David came out of his coma there is no way for her to even suspect she was pregnant.
When meeting Snow White, Grumpy tells her that he was imprisoned because he accidentally bought a stolen diamond he intended to use to propose to his love. Later, in Dreamy, which shows more of his backstory, it is revealed that he broke it off with his love because he was talked out of being with her by both their "bosses."