I understand that Epcot and HS has tiering and I can select one FP+ from group A and two from either B or C.

So, am I understanding this correctly, that since MK and AK aren't "tiering," that I can select three group "A" FP+'s? (i.e., Space Mountain, Splash Mountain and Big Thunder Mountain Railroad) for MK, and on a different day select three group "A" FP+'s (Expedition Everest, Kali River Rapids and Kilimanjaro Safaris) for AK, if they are avaialble?