Kyler,
Those cracks are common in osage, especially if you boil it for as long as you did. Two hours is a bit overkill. My dad tried making an osage recurve several years ago, and he wanted it to have thick but narrow recurves. He got the exact same kind of micro cracks in his bow as you did in yours. It didn't hurt the bow one bit. But if you want to avoid them in the future, I would only boil osage for 20 or 30 minutes. 2 hours is a bit too long, and once you pull it out of the water, all the moisture evaporates as steam, making the limb super dry until it cools down and re-absorbs ambient moisture. I think that might be one reason for the cracks. But yeah, don't worry about those little cracks....that osage is pretty damn tough and it takes a lot more than that to hurt it.