Continuity mistake: The garage door is broken at the start of the episode, dissolved partly through and falls down. Then at the party, an exterior shot shows the door fine and intact once more, but moments later when Morty is in the garage with a girl, the door is broken again.
Big Trouble in Little Sanchez - S2-E7
Continuity mistake: Morty is digging through a locker that is among a set of six other locker doors, the one Morty is digging through is the one furthest to the left. Immediately after Tiny Rick shows up, Morty is suddenly standing behind the third locker from the left. But also, Tiny Rick originally appeared on the right side of Morty and has suddenly switched to Morty's left side in the following shot. (00:04:10)
Something Ricked This Way Comes - S1-E9
Continuity mistake: This mistake occurs in four shots: As Summer asks Jerry for a ride to work, the small robot that Rick had built at the dining table has the butter to its left. In the second shot, the butter has moved to the robot's right side. In the third shot, the butter appears behind the robot. In the fourth shot, the butter returns to the robot's right. (00:00:50)
Answer: C-137 is the dimension they came from since the pilot. After C-137 is Chronenberg'd, Rick and Morty travel to a replacement dimension that we haven't found out the designation of (although they may have moved dimensions again). The "original" Jerry, Beth, and Summer are still on C-137 though.
Bishop73