OK, you mention a drop down list, but the list I showed isn't drop down. My images are of the my.avast.com site viewed in my browser and clicking that > (arrow) or anywhere in the Rewards heading displays another page on what rewards you have received.
I think that some of the rewards are only applied once in the week, even if you have done more. This should also be for each device that you have installed. For me that is two windows systems, so some would appear to be count double.
Not sure why yours is different, when you open your my.avast.com account are your devices showing that they are connected ?