Unfortunately, a very high percentage of vendors don’t list the correct specs. They would be the last place I go for actual data but they can be a great place to go to see if they have a link to the datasheet.
18650BatteryStore and Liion Wholesale are usually quite good with this though….not perfect (as we saw), but much better than others and I trust them as vendors. If they are told there is an error they take it seriously.