Creating new articles - The placement doesn't automatically select.

When creating a new article, by going into a Brand/Category and section and then going to Add > Article the placement doesn't automatically populate like it used to. This is now an issue, because many of the Brands/Categories are now not showing, or are unable to be selected in the placement.
Another issue I am having is that for an existing article when going in to add an additional placement, it replaces the initial location instead of adding a second placement. I have clicked the + button and it prompts me to manage placement, but the original placement doesn't remain selected.
Please advise. 
Thank you.