Unless I am mistaken no one has received points yet for week three - Kenai River, Alaska. I think that week will be the most telling for what they will and won't accept as a correct answer. The week two acceptable answers of "Royal Chitwan" versus just "Chitwan" doesn't necessarily mean that the program will filter out extra words. I think the reason both got points was because both are valid names for the same park. Many guide books still refer to it is a "Royal Chitwan" with the Royal included, even though the official name doesn't include the Royal at this time. I'm guessing they listed both as correct place names.
Hopefully they will post the Kenai points on Monday and we will know for week 5 what gets points. For instance, if someone put "Kenai Fjords River National Park Alaska" and got full credit then we will know it ignores extra words.