Since yesterday, I've had the numbers about my canvas spike for no good reason. Yesterday I started having 700 words in queue, and somewhere in that half hour the number crept up to 1450 words. When I go back to practice homepage, it dropped back down to 550 words which is the expected queue size.
Just now, I my canvas queue showed over 750 words, but go to practice homepage and it's only 240 words.
I can't tell when it happens since I have the to review numbers hidden from view due to small window size while practicing.
It is sometimes demoralizing to see your queue regenerating that quickly...