Multiple labels can be subtracted from posts in the Edit Posts page.
|1. Click on the unwanted label in the left column. |
2. All posts of that label only will then appear in the list.
3. Check those posts. You can click All.
4. Open Label Actions by clicking the down arrow.
5. Go down the list to Remove Label.
6. The label you wish to remove should be listed beneath Remove Label
7. If so, click Remove Label.