When you run mIRC, it will look for a servers.ini file in your "Application Data/mIRC" folder. If there is no servers.ini file there, mIRC will copy the servers.ini file from "Program Files/mIRC" to "Application Data\mIRC".
So if your servers.ini is being reset back to the original servers.ini, this may indicate that the file was deleted at some point.
I cannot think of a reason why that would happen unless perhaps your servers.ini file is being deleted by another application, for example, your anti-virus software (some of which have incorrectly treated servers.ini as a trojan/virus in the past).
