Okay, so I'm not going off the deep end. I am sure that offers are not always sticking when added. I'm sure I occasionally make mistakes. But, it had occurred to me a few times that I'd loaded the same offers more than once, like the day before.
The other issue I had was my OD/OM offers. I had 7 and used them for Disney gift cards. One didn't credit so I kept watching for it. Then went into offers and it wasn't added. It's absolutely possible I missed adding it even though I'd spotted it. So, I added it several days before its expiration before paying the charge. Still didn't credit and I let it go.
I don't load every offer. I skip ones I will not ever use such as Safelite windshields. Yes, I've had to replace multiple windshields and I've used them once and they've done a decent job, but I have a shop I prefer.