Quoting awesomebrandi:" I see the grain you're talking about. I think the issue is that the camera is using a huge amount of ... [snip!] ... to bring the photo up and I think that's increasing the grain level. From a distance they look okay, but they're a bit cool."
Check your exposure bias setting and bring it back to 0!
I sometimes use exposure bias too and after forgetting to bring it back to 0 a couple of times, I've learned my lesson. It's one of the first things I check before a shoot to make sure I have back at 0.