The NIC-level packet captures in PacketShaper S-Series are not capturing all incoming and outgoing packets on each interface. It captures all Inbound traffic in the 'in' file and all Outbound traffic in 'ot' file (half of the capture on each dmp file) but it doesn't capture all Inbound and Outbound traffic on the Inside interface ('in') and all Inbound and Outbound traffic on the Outside interface ('ot').
This issue has been fixed in PS v11.3.1.
Here is what was documented in the 11.3 Release Notes: