You put 3 POUNDS of molasses in 5 gallons?!? I seriously doubt you'll be able to taste anything else. All that molasses is going to overpower just about everything else. I'm guessing your ABV will be about 11-12%, so you MIGHT get lucky & the molasses might mellow enough to taste the cinnamon. Try adding 1 four or six inch stick to your secondary. The longer you leave it, the stronger the flavour. You can certainly add more if you want, but it easier to add more than it is to try to deal with having added too much. Regards, GF.