A shift to the left sounds like hide user pic is enabled, set up for no user pic. Open with SkinStudio ( free from
software tab if you do not have ) click XP Taskbar beside preview, click on user panel. On right will be settings, hide user pic, cna be set to enabled and disabled. Also in Text Settings first two are for user name, hor. and ver.
4 settings for each, by playing with these should be able to get user name the way you want it. Save changes and reapply skin each time, open start menu to check changes.