Windows (particularly 2008 and newer) includes lots of unnecessary stuff in the SNMP interfaces table, and Orion doesn't know that anything needs to be filtered out. If me or you were coding Orion instead of SolarWinds, we would put in some logic to exclude things like the Miniport virtual adapters and the Teredo ipv6 thing, but alas, we aren't.
If you want this changing then I suspect you will need to raise it as a feature request - it's not technically a bug.