Is your actual question regarding why the following transactions are in the log at all? If so they have always been recorded It's just recording the transactions it needs to make to place a below minimum stake bet. It's so you can see if any of these transactions had a problem in case a bet does not appear to be submitted at all.
49 20/3/2011 14:19 14065523615 Below minimum stake, lay 2 @ odds 1.01 OK 1533
50 20/3/2011 14:19 14065523672 Below minimum stake, update stake from 2 to 2.82 NEW_BET_SUBMITTED_SUCCESSFULLY 1472
52 20/3/2011 14:19 14065523843 Below minimum stake, update stake from 2 to 2.49 NEW_BET_SUBMITTED_SUCCESSFULLY 1583
53 20/3/2011 14:19 14065523049 Below minimum stake, cancel lay of 2 @ odds 1.01 REMAINING_CANCELLED 586