I think the two little "dashes" are actually small "0"s, except the last number actually has a small "6" followed by two small "0"s (i.e. it means 1600).

And note that the different positions on the "auto" selector dial indicate maximum distances for the aperture used, but not minimums. The auto flash circuitry will reduce the output appropriately for shorter distances.

And be sure to be consistent about using either feet or meters, but not both .