I have experienced something similar to this with my KBD67 Lite, the cause for this (in my situation) was the wire popping out of the stem on the most affected side, if you open up the keyboard and just put the wire back into the stabilizer housing/stem this will likely fix it although it may come back if the stab housing is worn down. Overall this should be relatively easy to do since it is a hot-swap keyboard and there is a screwdriver included. The reason it is a seesaw is because once the wire is popped out the stem on the affected side is higher than the one on the other side causing the effect you see.