@mielmi and @GaryBassler -
I have yet to do some grading and just checked that out and you are correct. A few days ago some one was complaining about filtering in the gradebook view where you used to be able to click on a section and it would show that section. Then when you clicked on another section it would just be that one. Now they are stating both sections remain selected and you have to deselect the first one. They were not happy with that change, and it sounds like the modification to the Canvas code that was made to make that happen as inadvertently affected what is being seen in speedgrader (that affect is not surprising seeing how they are both tied into the gradebook). I can duplicate the turn off in speedgrader by selecting section1 , then selecting section 2 to see a wording of multiple sections. Then I click on section 1 again and only section 2 comes up.
To see what is happening, you can look at the gradebook view as you select sections. The gradebook will show the sections that are being filtered. So if you click on two sections in speed grader, those 2 sections will be selected as filters for the gradebook.
Glad it was pushed up to a level 2 response. Thanks Gary.
Ron