First time EXP here and I'm looking to use my four SWUs for a trip this September with my wife (Gold) with the itinerary FLG-DFW-FRA outbound and PRG-PHL-PHX-FLG back. Probably travel on Saturdays.

I got myself an Expert Flyer subscription and it looks like there is zero C inventory for either of the long haul segments that whole month. Some questions:
1) If we book Premium Economy will that mess up the SWU processing?
2) Since it's 9 months out, how good are the odds that these actually clear?