How does Bard's Q actually work?

EDIT: Reworded since people seem to think I'm complaining that Bard can stun you to terrain as a general thing.

The tooltip says "seeks out a secondary target" but... does it actually "seek" like Chain of Corruption or Double Up? Because I always assumed it was just flavour-text for an ability mechanically identical to Baleful Strike and Light Binding...

But after watching one of my friends main him next to me in lane, as well as watching the few other Bards out there... I actually can't tell.

• If you have an ally nearby, it behaves like Light Binding. This is fair - it means you need to position yourself away from your allies or terrain and be safe.
• If you're isolated (i.e. no secondary targets nearby or have successfully positioned yourself away from your allies) - the ability seems to select the nearest wall up to 90-degrees, meaning you can get stunned at right-angles to your positioning with Bard. Some other bug reports for right-angle stuns : 1 and 2 (most of the responses are along the lines of "Bard needs every help he can get"). One of the comments states "Bard's Q selects a secondary target - they don't have to be behind you. It's not a bug".

I'm going to try and take a screenshot when one of my friends logs in.

Is it intended for the ability to have two different (heck, contradictory) second-target-selection mechanics? Maybe it used to be like a mini Chain of Corruption at one point in development (i.e. the ability used to bounce to/choose a secondary target and moved slower, so the counterplay was moving apart before they hit) and there's still a chunk of code attached to it? The combination of the two mechanics seems to remove the logical counter play of the ability (you might even say an anti-pattern)... you and your ally are running from Bard and you separate, then he still manages to stun you to the wall NEXT to you (not in a straight line, at a right angle). It'd be like Vayne's Condemn was just "knocks you into nearby terrain or, if none is nearby, straight forward" and moots positioning.

But I know some champions are balanced around bugs. I don't know how much of his power is tied into his ability to stun you at right angles. But there's some interesting "compensations" that could be added, if this is a bug and does get fixed and does hurt his power:

• Cosmic Binding could be able to hit terrain first and an enemy second.
• Cosmic Binding could form an impassible wall (for the stun duration) if it strikes two pieces of wall and no other targets.
• Bonus/fixed range between the first and second target, regardless of how far into the range the first target was.