TYPO3 Core

I sometimes have to log in twice for the BE (TYPO3 6.2.6).
I the actual case, the reason seems to have been that I hadn't converted BE Passwords to salted hashes yet.

This ticket is about the warning mail that is sent when it happens:
I fail to log in once and get this e-mail:

There have been some attempts (4) to login at the TYPO3
site "TYPO3" (projectname).

This is a dump of the failures:

19-11-14 20:22:  Login-attempt from 127.0.0.1 (), username 'user1', password not accepted!
19-11-14 20:22:  Login-attempt from 127.0.0.1 (), username 'user1', password not accepted!
19-11-14 20:22:  Login-attempt from 127.0.0.1 (), username 'user1', password not accepted!
19-11-14 20:22:  Login-attempt from 127.0.0.1 (), username 'user1', password not accepted!

always 4 attempts.

I've also had this for productive client projects and misinterpreted that they had been trying 4x.
Is this an error in the email or does the login form try to connect four times?