>This thread is a bit to much. Also the embeddege google maps is not good. I can filter out a category? Need to check this.

Account\Filters\Category filter, click on Add, use pick list to select category and click Save.

>I was creating this thread, selected Forum Universal Thread and the Category was stuck to the old forum. This happens from time to time.

The process of updating the categories, based on the forum selection, requires a connectivity to the backend server. If there is something not working well in the connection when this is executed, this might explain.