Using Mac OS 10.14.4 with the latest PM Plus Beta.
I've created a few collections with no problems, but now PM is acting odd.
I filter images by keyword and the result is 5 images. I select all, and the click in Add to Collection. PM adds each image twice to the collection. If I remove one or more images from the collection, PM deletes both copies.
I was able to create "good" collections with this beta, but now it is acting "bad".