word count ... Basic.01 ... is wrong

http://www.duolingo.com/#/vocab/a152efdb209e2645b2b50161963782c9

... says ... i have ( 6 words ) in Lesson 05

but ... http://www.duolingo.com/#/vocab/a152efdb209e2645b2b50161963782c9/5
doesn't show any words

and the word sum isn't correct ( 6 + 7 + 4 + 5 + 6 = 28)

... and not as vocab-listing says ... 21 words

see screenshot: http://imgur.com/7v7Jl1a

thanks