Khan Math Assignments

Hello.  In the past, when I assigned a Khan math skill, they would complete the 4 to 7 questions that it normally provided, and then the assignment showed up as completed for them as well as myself.  This year, when I have assigned a skill, after they complete the questions it then automatically rolls into a video, tutorial, or another practice skill and does not show up as being completed on their class assignment list.  I can still see how well they did, but for them this is confusing because it looks like they aren't finished and they don't know always when to stop.