It looks like your sister already has a profile for you. Is this you??
If it is, then the first thing we need to do is get your current profile merged with the profile your sister created. I would recommend merging into that profile so that you have a single surname in the Last Name at Birth field. This will properly list your profile on the Stewart genealogy.
I'm going to propose a merge, so you'll need to approve it and so will your sister. Once the profile is merged, check back in here, and we'll go to the next step.
Also, the reason only a few people are showing up on your surname page is because of the hyphenated name. If that is how your birth certificate lists your name, then it's fine to leave it like that, the Last Name at Birth field should reflect the name on your birth certificate, and the Current Name field can show your last name the way you use it now.
If you want to see all of the other profiles you imported, you can go to the My WikiTree menu and click on Watchlist. That will show you all of the profiles you currently manage.