That is odd that WiFi upload would be faster than wired.

Are you still on that household Internet access wiring setup? Through the "mains" I remember reading about.

I had a horribly slow upload on the cable (the company here is Spectrum) with copper and coax from a pole at the back of the yard. When AT&T installed fiber optic I was astonished to see how fast the upload was, mirroring download.