moa999 had already explained that there are some old fares displayed - that are no longer bookable because no OW airline flies there nowadays. He even specifically mentioned the Seychelles
Originally Posted by
moa999
The link is in the useful reference links.
http://www.wandr.me/RTW_Fares.aspx/
Caveats that it includes some old fares that are no longer bookable as no oneworld airline flys there (eg Seychelles)