zinzan, i'm not that experienced either but it is fairly common for a company to lay a little diclaimer if they think the market will misinterpret the announcement. They are just covering their ar$es. It is a sign of a responsible company IMO.
FDL inferred a few hundred million tonnes of iron ore just because the ground was red and it's next door to FMG... That's not very responsible but they did lay a strong disclaimer too.