why???

why is it that when you open two yahoomail simultaneously in IE and log in to check two different accounts, both the windows
end up showing the inbox of anyone account
usually the first one which logged in first.
This happens most of the time and only with yahoo.
hope what i have said is clear.

Because Yahoo uses cookies (a small text file stored on your computer) to control login sessions. If you receive two coookie from the same domain your browser will refer to the first one that is set, because one cookie with overwrite the other.

The simplest way round this is not to log into two accounts at the same domain simultaneously. :)

or use two different browsers.
or in the second browser, select "logout" (dunno if yahoo has this feature, but hotmail does) then login to the second account.