Awareofyou

Figured this out!!!! You do not check the box for the categories you want the blog post to be in. If you see the category in the list then it is in that category. the check box is only for deleted a category for that particular post.

Move collection items To move collection items to a new collection page: In the Home menu, click Pages. In the pages panel, click the page containing the content you're moving. Press and hold Shift and click the item or items you want to move. In the action bar at the bottom of the panel, click Move. The Move button only shows if you have at least one other page of the same type. In the Select Destination Collection window, click the page where the content will go. Click Move Items. The select and move options might look different depending on the page type. Where the items appear in the new collection page depends on the type: Blog posts, events - Items are ordered based on their date. To rearrange them, change the dates of the blog post or event. All other items - Moved items appear at the bottom of the collection. To rearrange the items, click and drag them.