We haven't gotten a good explanation why.
Hopefully they can be seen for an exam early this week, the results will be forwarded to the embassy and our agency will produce a copy of their biological mother's death certificate.
The embassy tells us that as soon as they have those two things, they can schedule our appointment for the visa exit interview.
(That means Drew or I will need to get on the next do-able and available flight to Monrovia!)