Season numbering
The season numbers for American Dad are a notorious mess. The cause of this is FOX changing their stance on the official season numbering various times throughout the show's run. For background information, check https://en.wikipedia.org/wiki/American_Dad!#Season...
TVmaze has decided to label the episodes under the "season 1 = 23 episodes" scheme. While the more recent statements from the show creators lean towards counting the first 23 episodes as two different seasons; the official stance as indicated in the FOX websites and listings back when these episodes aired was to label them as one season. According to our policy, the numbering scheme for a show cannot be changed after the fact, and thus whatever is announced first is and will remain valid.