Just saw this for the first time. Never really looked into this, so not sure if it occured pre-patch or not. kind of over the top here with the same entry in triplicate sometimes. (Can't imagine this being good for disk space down the line)
I should also note that this is a converted 2006 league, and that the txt file looks strikingly different after 01.01.1956 which is when I converted.
Here is the team transaction log also