Halo 3 ODST stats in MCC

I just noticed my stats in ODST (campaign) are not present after getting Reach. I’m pretty sure I finished two levels (definitely 1 level) recently on ODST after downloading it and they showed up on MCC stats for ODST. Now there is nothing there after downloading Reach. I haven’t tried starting ODST campaign again yet and I think I downloaded ODST a couple months before Reach came out on MCC. Anyone have a similar issue?