First, let me say that your service is simply fantastic. Thank you!
I sell one product only (a small 8oz box of playing cards), and can package it in a small box (1-2), regular box (3-4), or large box (5-24). I've searched the forums and can't find answers quite on point to the two I have:
1) USPS offers Priority Mail Flat Rate as an option. Is there any way to set shipping that at 5 units it uses this option, as opposed to calculating the usual Priority Mail price (it's about $16 difference!).
2) In the Item configuration it only lets me specify the unit count for one type of packaging; I set the limit at 2 for a Small Box. How does this affect the larger quantities and their boxes? If it's a problem, how do I fix it?