It's not that badly bugged. The majority of the 29 pieces of data I've collected was collected by scanning the obelisks. Several of which were confirmed by other cmdrs. We are supposed to be getting these pieces of data from this site.
What does seem to be bugged is that you can't rescan the same obelisk without relogging even when it switches back on after going dark and the way in which additional obelisks turn on. At the moment that seems to be completely random and seems to be determined by the proximity of cmdrs in SRVs. If there is anyway of determining what that is I've yet to figure it out.
Although something that could be worth testing in a private group is approaching a cluster of obelisks with different combinations of artefacts in different SRVs in a controlled fashion to see what changes (if any) occur.
And this is likely, but given the fact that only 13 have been achieved in solo, and the completely unpredictable, and non repeatable things seen with the instancing issues, delayed messages, missing messages, I don't think we can rule out some sort of bleed over.
Also, considering the only thing we have indicating multiple sites, and I do lean very heavily toward there being multiple sites, but the only hint we have so far that there ARE multiple sites is the plural "sites" in Ram's message...and that could just as easily be chalked up to clumsy wording.