.
I have shipped thousands of packages using USPS Priority and only one
package got lost. USPS is my friend.
.
Consider yourself EXTREMELY lucky. I could write a book of all my issues, problems, lost and damaged/destroyed items when shipping and receiving good via USPS. It got to the point where I opened a UPS account and haven't had a single issue since. USPS is a postal service not a shipping service run by the government (need I say more) with no accountability when something happens.