Login Blocked for 30 minutes!

[genesisrage]

i didnt properly logout of ispCP when i closed my browser, and when i tried to login again it says that account was in use.

i waited another minute and tried again, this time it gave me a warning that i would have to try to login in 30 seconds.

so again i waited a minute and tried again, then it says "You have been blocked for 30 minutes"

is this something normal when closing out the browser? and if so, how can i go about changing it so it closes the session when the browser closes (or even allow multiple sessions with the same user)