I've been trying to figure out the difference between what you have drawn to show me the 4 colours patricej, and yes it needs the 4 to work like that because.... I think....maybe.... the widths of the spokes that you have created in your PDF are different than the ones on quilterscache. When I printed & used your ones I'm measuring them now & the L1 E2 M1 C2 printed out at 2" line to line; whereas the N1 D2 I2 H1 pieces printed out at 1 3/8 " line to line. The final block stitched together measures exactly 12 1/2" but because I used only 3 colours it makes it look lopsided. Not sure what would be easier...pick out these miniscule stitches & sub in a 4th colour or start all over..... ugh!
And of course I could be way off BUT this is what it seems like to me at the moment....