The APS circuits are pretty slow to cycle around. I am on three:
US 19th century
US Covers (19th century)
US Revenues
I received each of them only 2-3 times this year.
I requested these a few months ago but I'm still waiting.
US Officials
US Fancy Cancels
I suspect that some members are keeping them longer than the recommended one week.
When you get your circuit box please try to pass them along to the next member as soon as you can. It increases throughput which is good for everyone: buyers, sellers, and the APS.
Here is the
complete list of APS circuits in case you are not a member and want to see what you are missing!