I think it may just need some time as-is -- muscle memory changes if you give it a few days.
For visibility, we do highlight which Playlists are selected/being searched in the Matchmaking window that pops up in the upper-right corner. We're discussing adding a little more info in that window to make which Playlists are being searched a little more clear. (Ex: Right now it shows "Standard" for both 3v3 Standard Casual and 3v3 Standard Competitive.)