Max 5 work experiences?

I have been struggling to set up my profile. When I attempt to edit the work experience, I encounter various unexpected outcomes. If I edit one position, it sometimes duplicates it. Then, when I try to delete the duplicate, it deletes an entirely different position instead. In addition, I find that it changes the dates from those I entered. And it seems to be not allowing more than 5 positions. And it gives no opportunity to upload a revised resume.