Hi Juniper.
I'm so sorry for not responding sooner. A couple of things I"d like you to check/try:
Open Capture and tap the Gear icon in the upper left corner of the app.
From the menu that opens tap Preferences
Make sure that Save Images to Capture Album is toggled "on."
After you do that, try creating something in Capture with an image you're taking (and not one that already exists in Photos). After you save the asset to a library. Check and see if you have either an Adobe Capture album or an Adobe Gather (I actually have both) album in the Photos app.
Let me know what happens. And don't worry, we'll figure this out.
Sue.