Do you have entries for the servers that you are connecting to in your servers list, each with the correct group name? If you do not, then mIRC will create a shared status.log file for all status windows which only gets renamed to use the network/group name once it has connected to the server and the network/group name has been determined from numeric 005. This will cause any servers that do not have pre-connect group names specified to use the same log file. This is a known issue and was addressed some years ago (there are several previous posts regarding this issue), however the feature was reverted as users thought the solution made managing log files too complicated.
