Question regarding 'Survival' (Ranger Special Ability)

Ok, I've read the second paragraph for a Ranger's "Survival" special ability, and the associated example a couple of times and a couple of things don't make sense.

To make sure I understand the rule, it SEEMS to say:

A ranger can always feed 2-8 people after 8 hours of foraging (assuming adequate food supplies).

Then make an attribute check.

If successful, feed 2-8 more people.

I think this is worded somewhat poorly and the 'ranges' given make it more confusing to parse. Effectively it says that a Ranger can always feed up to 8 people, and if he succeeds on an attribute check, can forage for 8 more hours to feed up to 16 people. Or to put another way, 8 hours foraging to feed 2-8, 16 hours and a successful check to feed 9-16 people (not 4-16, since 4 is less than 8 which the Ranger can always feed anyhow

).

And the example is odd. Nowhere in the rule does it suggest anything about the number of people the Ranger can feed being random, so I'm unsure what "The result is a 6, so the ranger has to feed 6 more people."

Another way of interpreting this is that a Ranger simply rolls a D6 and adds it to... 1 or 2? and that determines the number of people he can feed in the first eight hours (if added to 1 then it gives a range of 2-7, if added to 2 then it gives a range of 3-8, so this doesn't sound right as the rule's range is 2-8). And then if the wisdom roll is successful, roll again to figure out the additional number fed. But this version doesn't really work with the example either.

So... clarification?