Tested this problem out all night last night. two issues.
1) I have two shortcut bars placed VERTICALLY on the right side of my screen side by side. after each login, they diminish in width, narrowing each time till they are tiny. no other shortcut bars on my screen do it no matter where they are placed.
2) After each login, and with each instance change, the primary shortcut bar loses its memory and defaults to blank. I have to scroll it to the items i need each time.
edited to replace horizontal to vertical. Apparently I dont know which end is up!