So... the only way Dab and I could have both been roleblocked simultaneously is if there was some kind of ability in play based on who we targeted , rather than who was doing the targeting. Even with a Bus Driver in play, I think that Dab would've still seen me go to the target if we were both redirected. Say the Bus Driver swapped Mad with Pellaeon: I go to do my thing at Pellaeon, and Dab is redirected to be watching Pellaeon, so he sees me go to his target and believes I went to Madaghmire.
This would be a lot easier if I knew the details of how all these roles interact with each other...
So , if Dab and I were both roleblocked simultaneously, that still leaves the unexplained discrepancy between Ginkapo and Broba, which can't be explained by either roleblock or Bus Driver.