Active Directory monitoring with multiple data inputs

I'm trying to use the Active Directory monitor data input to monitor AD and I've setup 5 data inputs that start at different OU's. But once the initial Sync has completed only one of them seems to work and find updates.

Should you be able to do this?

The reason why I've done this is there are parts of AD I do not want to monitor and there's no apparent way to exclude OU's from scanning.