Great idea! I will pass your suggestion along to our Product Management team for review.
In the meantime, you can either use the Range to Display to adjust which 2 labels you'd like to print each time, or you could select "Thermal" and print 1 per page without having to adjust the Range to Display. Be sure you paper size is defaulted to letter as well!
Due to the size of paper that we support, we won't have the ability to add functionality to support 2 labels per page at this time. This is something we will note when we begin work on a new print process for WebForms.