How did this happen?

Advertisements for TD Bank and Tangerine, SkyTrain station, Vancouver, BC

I saw this last week. Any media buyer worth their title should have rigid clauses in their contracts to prevent things like this from happening. Having your advertisement between two ads for one of your competitors sends a very confused message to consumers.

I'm not really sure who this harms the most, but both TD Bank and Tangerine (owned by the Bank of Nova Scotia) should complain.