I noticed this confusion when we were up Inverness way in the summer. Didn't actually get to visit the site though.

It's very a busy landscape up there, so much so that I'd even suggest that the tmaEds would be doing their viewers a big favour if 'Clava Cairn' were added as a separate sub-category of cairn, as like GW says, they're 'two-for-the-price-of-one' monuments (three for one if you include the cupmarks), so they are well worth seeing. There are probably a few people out there who would like to find info on some of the ones that aren't as busy as Balnuaran.