You got chat locked…..This can happen if your using illegal software allso just hitting emotes or typing to fast and sending to many messages in chat will cause it…its yahoos way of stopping the rooms from being scrolled and it has stopped room booting…………it didnt give you the invalid log in though did it shifty

changer your passord first because it sounds like some one figured that out…….. ip addresses have nothing to do with taken accounts unless some one actually hacks in and thats not likely too much work to hack for a yahoo account………when you make passwords use numbers and letters and the longer the better