As you're aware, the portal stone is not displaying all the claims you may have. If the list displays a 1 then that is definitely a 1, but a 0 may not really be a 0. We believe that most of the issues in this thread are caused by a character having a previously existing claim whose location is still unknown. Those claims are still out there, there just isn't an easy way to find them at the moment because a 0 on the portal stone may not really be true.Because those lost claims are older, players who placed a new claim on Serenity but already had an old one would have had the newer claim removed today, and that's why so many of you are reporting this issue today.
Allowing you to find your old claims is a high priority. We are already working on a permanent fix, but expect it to be several days still before it's complete; so in the short term we're going to implement a temporary solution tomorrow morning. This will require a server outage, but after the outage the portal stones should correctly display claim information. However, the fix is only temporary because new claims going forward may still not display correctly on the portal stone until the permanent fix is implemented. Once we have a more precise time for the outage we'll let you know, but probably later morning than earlier.
For those who report having both no claim and no flag, once we have the temporary fix in place we should be able to identify those people more easily.