Tagged in public photos, but don't show on Timeline/photos page.

Hi,

I'm a member of a public group on Facebook and they have just posted an album filled with photos with various people tagged in. The setting of the album is also 'public' so everybody should be able to see it. Yet nobody that has been tagged in these photos seems to have them appearing on their timeline, or anywhere on their photos page for that matter.

I have noticed that other pictures I have been tagged in (different ones, that do have appeared in my photos page) have a button to choose whether or not I want it showing on my Timeline. None of these photos in this album have this, even though, as I have said before, they are all set to 'public'.

Does anybody have any idea why this is and what we can do about it?
All I can find online when I try and search for is are ways to prevent tagged photos from showing up on your timeline, sigh -.-

Thanks in advance!