That’s because it’s remapped on thexem.de so the episodes released match the information from TheTVDB (except for WEB DL, but that’s another can of worms).
Sonar Version: 2.0.0.5252
Synology DSM 6.2
Description of issue: The Good Place had it’s first episode as a combined E01 and E02. The online database has it as two different ones. So It’s off by one always - the current week’s episode shows in the Sonarr Calendar as airing the following week. It also doesn’t search for and find the episode automatically for some reason, even if I do a manual search for it. I have to download it separately and manually put it in the directory.