They're in geosynchronous orbit, so they rotate with the earth, are always over the same spot on earth at the equator.

Don't know which satellite series is used for this service, but the Inmarsat constellations aren't particularly large: http://en.wikipedia.org/wiki/Inmarsat#Satellites, so it could be they only got solid data---and it's not very specific---from one satellite.

I also wouldn't put much confidence in mass media reports saying "satellites", and the Wikipedia plural use is probably based on them.