Why so few today?
I would have thought you would be familiar with the answer, the number of times this has been posted.
Note Avast has for some time been delivering multiple stream updates as a combined update. If you regularly shutdown your PC overnight (as I do) when you come back on line you get all those you had waiting as a combined multi-stream update counting as 1.
Soon you won't have to worry this when the Stats function goes on Holiday for a complete revamp.