Starbucks Ninja was offered Border Skirmish (and nothing else) in Latos H2...

Possibly because he had Border Skirmish already active.

Was not in a group at the time

UIT can take Border Skirmish without being in a group.

Well in any case he wouldn't have taken Border Skirmish...possibly a Liquidation mission, but no Border Skirmish

[edit] And are there two BS' now? Or is it a bug that this was appearing in Latos? Because SN hasn 't been out of Grey space in a loooong time.