@John *******
if you're using Bangkok, any Sandbox hotel will have the tests included. It's just how it works in Bangkok. The SHA Extra+ was instituted mostly because of the Test & Go program where people were booking hotels that didn't include testing, but if you book an actual sandbox package and it says sandbox, it shouldn't need to also say testing on the receipt.
It gets even more complicated because the packages don't and never have included testing in Phuket because you pay for that separately from a government website and have your test done at the Phuket airport on arrival.