It seems like you now have daily graphing set to run at 23:58 each day.
Having it run 2 minutes before the hour is probably not a bad thing as it will reduce PC resource demand when other things are done on the hour, especially if your XP machine isn't a particularly high spec.
23/05/2015 2:24:01.39 - ONGOING-ISRUNNING-022400-125.TXT - ****** PC_Speed is set as "FAST" in the ini file, times in loop = 01 *** numbytes = 0
23/05/2015 2:24:01.40 - ONGOING-ISRUNNING-022400-125.TXT - At start of expect("gin:"), sleeping for 0.500 seconds *** numbytes = 0
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23/05/2015 2:24:06.70 - ONGOING-ISRUNNING-022400-125.TXT - total_sleep_time = 2.600 seconds
One last thing you may wish to try now that everything seems O.K. is to change the PC's Speed settings via the GUI.
The FAST setting is for high spec PCs that try to process the raw stats quicker than the modem can actually provide them.
This setting actually adds a few 0.5 second pauses in my programs when needed, to avoid them getting ahead of the modem.
The MEDIUM setting adds 0.25 second program pauses when needed.
My Windows 7 PC isn't particularly high spec, so I use the SLOW setting, which doesn't introduce any program pauses.
From memory, I think Ronski added the 23:58 timing for using the programs on his server which was sometimes very busy at midnight, slowing everything down etc. & it was occasionally missing the daily graphing when the timing was set for midnight.