Yes, that’s the way it looks to me, actual classes get grades but AP and CLEP do not.
I think the course number 1999 means that OU is giving general credit for that course for general class standing but it doesn’t count for a specific requirement because it doesn’t match anything in the pre approved data base. If you want that credit for a specific OU course you need to have it approved by that department. You likely need to turn in a course description, syllabus, and texts used.
Yes, my dd has several credit for course that aren’t required, they can be used as elective credits and for course standing. Even though my D is starting her freshman year with enough credit to be a senior, she’s still needs for year to compete her degree plan.
It’s best to talk to your advisor. I don’t have a clue about how the honors courses work.