Auburn played 4 OOC games that year while alabama played 3.
The only reason I can see for this is that AU played GaTech that year, which had previously been a conference game but was no longer one since they left the conference.
Doesnt make a lot of sense that they wouldnt have just made GaTech one of their 3 ooc games and just scheduled another sec team in its place but for whatever reason, they didnt do it this way.
Would be interested in knowing why it was done this way to be honest. There may be an interesting story behind it. Lord knows just about everything in the history of the SEC has a CSB behind it.