When I found your grandfather Alfred Heath-6875, it looks like you are putting 'public' in the prefix of some profiles, which should not be there. You will get a Suggestion for that field because that is not a 'normal' prefix for a profile.
It looks like there are 2 profiles for his father Thomas, which is why some of his siblings are showing as 'half'. Heath-4699 and Heath-6889. There is a Suggestion 409 for that problem because they are both married to your grandmother Bridget Ryan. There are no sources listed on either profile, so it would help to get sources added to your profile and the next set of grandparents, which might help to resolve the correct maiden name of the grandmother.
You will need to merge those duplicated profiles because we only want to have one profile for each person on wikitree. Remember, we all 'share' the same tree. The PM of the other profiles is active on wikitree, so you should send her a message, explaining your relationship to that family.