I love that you have all the different sizes listed in your instructions ... but am still confused for clue #1 - what is the 1a? Are we making two sets? one with twice as many as the other?
Example - crib size:
1 - square color 1 and rectangle background color, 160 pieces - when sewn together you will have 80 rectangles with one corner contrast triangle.
1a - same thing, but 80 pieces, will have 40 constructed rectangles with corner contrast triangle.
Then repeat with the contrast triangle mirrored.
Put together 1 with mirror 1 for a total of 80 pieces; and then put together another set from 1a/1a-mirror pieces for 40 more constructed rectangles. Total 120 constructed blocks. Is that right?