I work on campus so I've been checking every morning, I'll try to post when/if numbers change. So far nothing different today. MUSC has intense network security or whatever it's called so you have to be connected to their server to access it.
I don't think anyone knows for sure what the difference between "pending" or "in progress" is. If I had to guess, I would say in progress would be waitlist, although it seems awfully small, and pending are people who have been offered either from WL or accepted and haven't put a deposit in yet /accepted a seat or it could be those who are accepted but haven't PTE. if someone who has been accepted can tell us how long you have to accept an offer/put down a deposit that would be really helpful!
Also I wouldn't be surprised if they looked at the IS WL first over the OOS which is why the IS is smaller since maybe they are going through that first? we also don't know how many people have dropped off due to self-elimination so who knows. Just my opinion.