OS X :: Creating New User Folders For Every Log In

I was having the low memory available error so I deleted all unused programs ( garage band etc) I moved pics on a flash drive then deleted them ( and emptied the trash) (but whats odd is I put 6+ GB on the flash drive but only recovered 2-3 GB ?) anyway I was looking to see where all my space is and I found the users folder that has a lot of folders that look like archives of my disk, the newest one has my recent desktop and photos etc, why are these here? they take up to 14 to 35 GB each! can I delete them? they have all the pics and movies I thought I deleted ( as well as garage ban app) so when I look at the info section they all say they where created on the same day- march 18th which is the day I stupidly re-named by home, I eventually put the old name back and copied the created archive back in home and I thought all was well. since then the only thing I have noticed is a slow start up ( after log in password. Is it looking for the folder that takes so long? I have file vault turned on. sorry this is long and confusing, I am new to this type of thing- I am off warranty also

here is pic of the user folders listed ( at the bottom that can't be seen is my home folder): [URL]