Why do i have undeletable garbled passwords on my ipad?

When I go to log into an account, I use the touchID to bring up the correct saved password, only it comes up with the garbled string of nonsense that I never saved instead of the password I DID save. And when I go into settings to the passwords section, there are literally dozens of these “passwords” on nearly all of my saved accounts. I don’t know how they got there and I can’t for the life of me get rid of them. They just pop right back up. My real passwords are still there. They’re just buried under all the fakes.

It’s the same thing on my phone. A bunch of junk I can’t delete. This is a sample of what they look like .

But my MacBook looks normal when I check it out. I don’t use the computer that often, though, since the iPad is handier to carry with me. So I’m wondering if it’s some sort of a virus or something causing it.

So is it normal for one login to have like five saved passwords? None of which can be deleted? It seems very odd.