Welcome to WikiTree. Your folks are all there.
Look at your Watchlist (On the My WikiTree dropdown at the top right of your screen, go near the bottom of the list and click on Watchlist.) You will see that there are over 400 profiles there. Probably when you imported your GEDCOM, some profiles were duplicates and you had to leave them out, or perhaps they weren't connected in the GEDCOM. Now you need to reconnect people by connecting the children to their parents.