why don't you just combine everything into one cycle. that would be my suggestion. nothing dangerous about it the way you have it set up except that you will be shut down for a while.
Dont continue, save it. 20 weeks is too long, you will be shut down HARD after that long and after Deca.
Next time, combine the shit together for a ten weeker.
go with what the other guys said and throw them together. I still am trying to figure out why everyone says deca shuts you down hard. I retain more of my gains from deca than any other AS. Maybe that is just me!