What does the F@h client status updating mean, mine has gone to that status twice in the last couple days and when it does it stops folding all together. The only way to stop it is to go to task manager and end the process, then open the client again and it resumes where it left off in the middle of WU's.

It's doing it in the advance view window of the app itself.

Had that happen the other day on a Win10 rig. I nuked everything and reinstalled with recommended settings before leaving for work. Quite a few people are experiencing this after doing a custom install even on the C drive. I wanted to open it manually like I always have and kill it when doing other things on that rig.

Cool GTX
  Found this thread ---> folding client stuck on updating but still producing results

Thanks bud, I'm back out on the road doing deliveries again, I'll check this out when I get home.

Each month beginning to end (1st to the 30th or 31st (Feb 28th or 29th))
I never noticed anything about the 20th of any  month on mine. If it has a submit button, click it but only if you know you have reached the tier. There are times at the beginning of the month that show up wonky and add your entire year xx to the month.
 
edit, if you forgot to claim last months bucks you can still claim them. You can not claim forgotten months from year 1-12 as there is a deadline. The years start and end with March 1st.