Hi Beth, thanks for your post.
You can edit this junction yourself as an editor in Map Creator. Select the splitter link on the right, right click with your mouse, and select ‘Remove this road’ in the drop down menu. Then we need to amend the direction of travel on the remaining splitter link, to make it into a normal t junction. You can do this by selecting the link and under the ‘Direction and Lanes’ section, changing to ‘2-way’. I’ve attached a screenshot of this editing menu.
Remember to save your edits afterwards!
Let me know how you get on and if you have any other questions, thanks, Claire