Hello,
Now today while running through your list, I did at least figure out why USPS was an issue on Site #2 (our test site) is I didn't remember to change the Country so of course USPS options were not triggering due to International. So USPS seems fine.
Now on a hunch, I tried enabling all the shipping services on UPS on both sites vs just having one or two them checked.
Both sites start showing UPS results again - of course now I was getting results for services I didn't want.
So I started running turning them on one at a time.
Basically I found that for any UPS services to show results you must have the very last option check "UPS Freight LTL Urgent (ALL)".
If I do that, then any other options I select show up fine in checkout as expected.
Obviously I don't want that Freight service ever showing but at least I can trick into working for the time being on UPS.
Thanks for your feedback, we'll try to check it on our end.
Regarding your FedEx issue, can you give us a temporary back-end access through our contact form so that we can directly test and debug it through your website ?
www.hikashop.com/support/contact-us
Thank you.