So, we installed the new patch in order to switch the URL's to secrure as directed. Using ZC 1.5.7a and the 2020-09-24 K11 build from USPS. Am I missing a setting somewhere? First Class does not show up as an option even on the lightest shipments, and I'm losing orders based on only priority mail and express mail showing up. I've gone back and checked the USPS module, and really didn't change anything except the handling fee. I don't offer flat rate for anything, so the only options my customers have are First Class Package Service, Priority Mail, Express Mail, First Class International Package, Priority Mail International, and Express Mail International. Here are my settings in the USPS module:
USPS Version Date
2020-09-24 K11

Enable USPS Shipping
True

Full Name or Short Name
Long

Enter the USPS Web Tools User ID
XXXXXXXXXXXXX (changed from original for privacy)

Which server to use
production

Quote Sort Order
Price-LowToHigh

Handling Fee - US
2.5

Handling Fee - International
3

Handling Per Order or Per Box
Order

Decimal Settings
3

Tax Class
--none--

Tax Basis
Shipping

Shipping Zone
--none--

Sort Order
0

All Packages are Machinable?
False

USPS Options
--none--

USPS Domestic Transit Time Calculation Mode
NEW

USPS Domestic minimum Length
8.625

USPS minimum Width
5.375

USPS minimum Height
1.625

USPS International minimum Length
9.50

USPS minimum Width
1.0

USPS minimum Height
5.50

Enable USPS First-Class filter for US shipping
True

Shipping Methods (Domestic and International)
0, .21875, 0.00, 0, .8125, 0.00, First-Class Package Service - RetailTM, 0, .8125, 0.00, 0, .9375, 0.00, 0, 70, 0.00, 0, 70, 0.00, Priority MailTM, 0, 70, 0.00, 0, 70, 0.00, 0, 70, 0.00, 0, 70, 0.00, 0, 70, 0.00, 0, 70, 0.00, 0, 70, 0.00, 0, 15, 0.00, 0, 20, 0.00, Priority Mail ExpressTM, 0, 70, 0.00, 0, 70, 0.00, 0, 70, 0.00, 0, .21875, 0.00, 0, 4, 0.00, First-Class Package International ServiceTM, 0, 4, 0.00, Priority Mail InternationalRM, 0, 66, 0.00, 0, 4, 0.00, 0, 4, 0.00, 0, 20, 0.00, 0, 20, 0.00, Priority Mail Express InternationalTM, 0, 66, 0.00, 0, 4, 0.00, 0, 70, 0.00, 0, 70, 0.00

Extra Services (Domestic)
Certified MailRM, N, USPS TrackingTM Electronic, N, USPS TrackingTM, N, Insurance, N, Priority Mail Express Insurance, N, Priority Mail Insurance, N, Adult Signature Restricted Delivery, N, Adult Signature Required, N, Registered MailTM, N, Collect on Delivery, N, Return Receipt, N, Certificate of Mailing (Form 3665), N, Certificate of Mailing (Form 3817), N, Signature ConfirmationTM Electronic, N, Signature ConfirmationTM, N, Priority Mail Express 1030 AM Delivery, N, Certified MailRM Restricted Delivery, N, Certified MailRM Adult Signature Required, N, Certified MailRM Adult Signature Restricted Delivery, N, Signature ConfirmationTM Restricted Delivery, N, Signature ConfirmationTM Electronic Restricted Delivery, N, Collect on Delivery Restricted Delivery, N, Registered MailTM Restricted Delivery, N, Insurance Restricted Delivery, N, Insurance Restricted Delivery (Priority Mail Express), N, Insurance Restricted Delivery (Priority Mail), N

Extra Services (International)
Registered Mail, N, Insurance, N, Return Receipt, N, Electronic USPS Delivery Confirmation International, N, Certificate of Mailing, N

Retail pricing or Online pricing?
Online

Debug Mode
Off