Watching on Amazon Prime and noticed this mistake on Season 4.

Just came across a silly little mistake and wanted to see if others had it cause I couldn't find anything online, but they put 4x04 *over* 4x02. Episode 4 is still Episode 4 but **I'm missing a whole episode**, which is just dandy... have to move onto 3 and read a synopsis I guess. Anyone else having this issue?