It's a bit of a mess, isn't it?
You can practise -ed / -ing adjectives in these links:
http://englishinfocus1.googlepages.com/Adjective_Endings.htm
http://ww2.college-em.qc.ca/prof/epritchard/boreding.htm
And a few more NEW exercises in these links:
http://www.manythings.org/fq/
ADJECTIVE ENDINGS - ed/ing, by Carlos Reis
Adjectives -ed -ing, by annapf
-ed and -ing adjectives, by Anselmo
I hope these excercises are interestING for you!
Good Luck!
