highlighted objects for missions

some missions, mostly "own the spot" challenges, specifically the "undulator" challenge, have highlighted obstacles or objects that are supposed to be tricked on or off of. they say to do a certain amount of tricks on the object. but when a flip trick is done onto the obstacle, it doesnt count the trick. it only counts trick done already on or tricking off the obstacle/object. if it wants me to do two flip tricks and a grind on an obstacle, i should be able to cleanly do a flip trick into a grind on the obstacle and then flip trick out the grind of the obstacle and have that be the completed mission. thank you.