I can't seem to find a way to move my uploaded images into an album on Imgur.
Am I missing something? Is it not possible?
You need to do the following:
A Select images for this album pop-up then appears. The boxes on the left allow to add images that are not in albums, or all images.
according to a help article located at https://help.imgur.com/hc/en-us/articles/203921555-How-do-I-add-an-existing-image-to-an-existing-album you may add an existing image to an existing album or to a new album. Please note that you can also share your album via link or HTML embed code using "Share this Album" section located on your right.
I am not yet sure if it is possible to add other public images on imgur.com ( which someone else uploaded or you anonymously uploaded ) to your new or existing album. But I wish if there was a way to do so.
Also note that you can control the privacy of your album by using "Change Album Settings" link as shown below.