Forgotten MH Fact #217: 

(OOG) At some point between Entry 38 and Entry 50, Joseph (Alex) misplaced the blue striped jacket that Alex was wearing in 38. Since Entry 50 takes place immediately before and after the events of that entry, a replacement jacket had to be ordered from online in order to avoid a glaring continuity error, causing a delay in Entry 50′s production.

Forgotten MH Fact #223: 

(OOG) The shot in TTA’s Reminder of Jay checking out the antique shop was inspired by a goof in Entry 53. The reflection that can be seen in the glass in 53 was actually Joseph (Alex) standing in the background; when the entry was uploaded and fans noticed the figure, the series creators decided to run with it. 

Forgotten MH Fact #154: 

While Alex is punching Tim in Entry 86, they both are briefly transported to a room in the abandoned hospital, and the Operator is visible behind Alex. Immediately after this, they are back in the shack where they previously were, before being teleported back to the hospital a few seconds later.