I would tend to follow the package rather than the website, particularly if it appears that the packaging was labeled by the distributor rather than the retailer. Hops often vary by batch, and the retailer may have hops from several batches on hand, so, they may have just pulled one package out and used that for the website number. Or, they may just be using a general "representative" number for that variety of hop.
On the other hand, if you decide to believe the website value, the worst that will happen is that you will over-hop. But, over-hopping can be somewhat alleviated by aging. I'm not sure anything will fix an underhopped beer (short of adding some isomerized hop extract).