I keep my 'ladder' as straight as possible. When these units are new, the bubbles won't travel properly for the first couple of days, until a little bit of slimecoat builds up, then they'll travel correctly.
Putting it off kilter shouldn't really help dissolve that much extra CO2. I'm sure it went up one ramp twice as fast as normal, and then half as fast on the other side. Total time the bubble spends in contact with water is the same, so the CO2 diffusion should be about the same.
I put mine in the corner, so I could put the side against the wall of the tank, making it level to begin with. So far it has served me well.
You might want to make a gas separation chamber, which puts more pure CO2 into the tank.