Frank, I've got Windows 10. I notice that for the items I'm selling the number of watchers is always populated, but the number of views occasionally goes to "-" and then magically reappears later. So is it Windows 10 or a glitch in eBay I couldn't tell you but you are not alone in seeing that phenomenon!
I collect gas pump salt and pepper shakers and the plastic coin banks both made by AVSCO.
For what it's worth... I used ebay a ton over the last couple of months, as I had a lot of smalls to sell. I found it to be very glitchy. I was very careful and thorough when posting my ads, and it would later change my postings, for example, I never put to accept offers or ship outside the US ... and all of a sudden , it's changed. I wouldn't sweat it too much, and just expect that goofy things will happen.