There are actually several instances where there is an encap route for a /16 and then there are some /28s or /29s nested inside it.
BGP-only subnets aren't in the encap file.
Our BGP-routed /16 is in the encap file as well, for compatibility with gateway stations that cannot send their net-44 traffic over internet due to source address filtering, or that are otherwise configured in such a way that net-44 traffic is never sent to internet directly.
So we are one of those /16 networks with several small networks and single addresses inside it routed to different gateways. I don't know if the other instances are a result of the same setup.
Good to hear that those are properly handled.
Rob