I was able to resolve this issue by sending the size of the label before each print using the following zpl :
! U1 setvar \"zpl.label_length\" \"height\"\r\n! U1 setvar \"ezpl.print_width\"\"width\"\r\n"
I tried using the windows setup and sending those commands but they do not seem to stick, so unfortunately I have to send them each time. But this at least resolves the issue.
Hi Joseph, Try following these commands with "^XA^JUS^XZ". It should save these settings.