*Waves!* Um, I didn't think it was necessary to pick all perks at the same time. I may be wrong about that, but I do know that Lex had the same problem (couldn't let me be GM because I already was) couple of years ago, and it was no big deal in the outcome.
Cheers,
GG, 826 miles from PM. ;->
You have to pick both DM perks at the same time. You can hold off picking the PM perks. This means that if you want GUCs and GM gifting you're in trouble unless you can hold off until Mar 1 for the GUCs. I was in the opposite quandary last year. Mr. NotHamSarnie needed to be regifted Gold when I requalified for DM in October 2013 (I had dropped to PM the previous year so he lost status) but I wanted to wait until GUCs were in place in 2014. His needs won, so I had to choose my Gold gifting and SWUs at the same time and I lost out on the GUCs. It's very annoying.