For placing the running header, the only suitable position as per the APA Style guide is the top left side of the page. Moreover, it appears on every page without any exception. However, on the first page, it should be placed with this line “running head”.
In this way, you make it easier for readers to understand that you are using a short version of your main title. If you are having trouble with the running header or other parts of the paper, don’t forget to get from the experts.