If you've been invited to become a member of multiple Organizations, you may toggle between Organizations using the dropdown prompt on the Review My eLearning dashboard.
It's best practice to choose the appropriate Organization when uploading a course, because it will impact which users are able to easily access the course.
For example, if you have joined Review My eLearning as an Uploader for Company A, you will upload courses for Company A as per usual. Then, if Company B brings you on their team as an Uploader, you will need to utilize that dropdown to ensure that courses made for Company B go to Company B, so that the Account Owner for Company B can oversee their relevant operations.