Wow, you really predicted it correctly.

Dortmund are still not a credible team to bet on.
Dortmund are never a credible team, at least in this season especially when matched with teams of relatively equal strength, you find Dortmund fooling around on the pitch like they did yesterday. I'm so much scared when taking a bet for them in the bundesliga, the closest team to credibility in the bundesliga after Bayern is Leipzig. These guys are just good but not unstoppable though but they are a team you can bet your money on and remain calm about it.
It could go on like that and Bayern could go on victorious but if they would underestimate their opponent and will not focus on the match the outcome can be different from their last fight, I could say that Bayern is not unbeatable a couple of instances that they lose their focus,
No team is unbeatable likewise Bayern but then, for almost every game that you find Bayern doing badly, you can agree that they seem to put forth an attitude of negligence towards such game due to under estimation of the team they are playing or loose focus as you call it before they get the kind of result that would end up enriching bookmakers. Other than this, you can agree with me the lots of damage Bayern could cause should they be in the game.