lol -- so, the plan was to make the quilt with half 12" blocks and half 6" blocks combined to make 12" blocks. So, it's just a throw - with a total of 12 blocks. Great. So I need double the number of 6" blocks to make the big block sets. So I cut out 12 sets of stuff for the 6" blocks.
WRONG -- FOUR 6" blocks make a 12" block. duh.
why is math not my friend...