I also only got 50 pts after litting all 5.
I am curious, is it possible that the extra 10 is only given if you were 100% correct and never failed? I know I have "failed" in attempts because I'm color weak, so lighting&water, wind&earth are very hard to tell.
If that is the case, that the 10 is only given to those who were 100% correct, I'd have to say it's a very bad practice to discriminate against the color weak/blind....