yes, i noticed that .. it will log it even the first time like you say, but will not show it.. weird, i'll check that out.
the good thing that i forgot to mention is if you visit the cp 100 times it will not make a new line in the log file, so you won't end up with a 50MB log file
it will update the current line IF the IP is the same. it will just update the number of visits and the date/time.