Xbox live captures are showing wrong captures. Delta preview and on xbox app

There is an app called upload studio. Are your captures and screenshots still there at least?

Once in the Upload Studio:

1. Open the guide > Broadcast & capture > Capture > Manage Captures.
2. The default filter shows everything already published on Xbox Live.
   
   To see clips you’ve captured but not yet uploaded, select the filter On Xbox Live and choose On this Xbox.

I do own the app. Captures will not delete from there either.

The captures also do a cycle where it shows all the “deleted attempts” and won’t delete, then it’ll show no old clips I’m trying to delete (it’ll show any recent clips I’ve tried to add) and that’s when it allows me to upload. It also will show all my old clips and screenshots and when I go into recently captures, it shows the most recently added captures to Xbox live. Right now, it is showing 101 clips and when I click on recently captures, it shows the 4 I managed to slip on to Xbox live only. It’ll eventually revert to the 101 clips and not show the most recent ones.

Maybe your're in the wrong sections try looking in the upload que for the captures as your xbox live captures may be full

On Xbox One, when you make game clips with Game DVR, use the Upload Studio app to view and edit them.

1. Open the guide > Broadcast & capture > Capture >
   Manage Captures.
2. The default filter shows everything already published on Xbox Live.
   
   To see clips you’ve captured but not yet uploaded, select the filter On Xbox Live and choose
   On this Xbox.

Go to the App Store, or Google Play and download the Xbox app. You can then upload your game captures to Xbox Live, then use the mobile Xbox App to download your captures after they're uploaded to Xbox Live. You can also click on the share options for
your captures and upload them to Onedrive and use the mobile Onedrive App to download to your phone.