I think of the check as the money part and the stub is the run sheet which you can download or get in the mail with the check. Add up the royalties for 2018 from the info sheets and they should total the 1099 or be just a month different.
Do you have surface rights with a wind farm on it? That is the only other thing I could think of if Cedar Creek was involved. I do not see them on the OTC tax site as reporting on that section.