USPS Shipping Module [Support Thread]

[RixStix]

I'm checking it out and I don't recommend changing those weights from their default, since those are the maximum weights that USPS accepts. There appears to be something funky going on with the International F/R small box.

I've been using weights similarly for years to solve the same specific need as described without a hiccup. One possibility could be a total weight of 1.25 pounds which is not inclusive in any options (or an invisible rounding error just going over 1.2 pounds). I use the 2nd decimal weight to prevent creating that weight window. 0-1.50, 1.51-3.00, 3.01-7.00, etc

Could another possibility be a 'slight change' in the nomenclature used by the USPS in their Jan 24 update? They were notorious for making a single letter or space change a few years ago.