Half a season missing

Hello- I recently added approximately 26 episodes of a show called Mike the Knight to my server. Plex is finding 18 of the episodes without a problem. It identifies Ep 1 then jumps to 10, ignoring 2-9. The files are all named properly and consistently. Any ideas?

If you would give us an exact example of how you have your folders and files named for this show it would help us in determining your issue.

REF: https://support.plex.tv/hc/en-us/articles/201543057-Why-is-some-of-my-content-not-found-
REF: https://support.plex.tv/hc/en-us/articles/200220687-Naming-Series-Season-Based-TV-Shows