Not sure how U bled the brakes after U had them apart...but this flow chart may help.
Also, tis presumed that orginal braking and combination systems are as OEM and not hung off a leading link. Yes?
If so I personally cannot offer any further thoughts. I have read through the OEM construction and function manuals and nothing specifically jumps out other than the ECU is constantly monitoring both wheel speeds and their interaction with each other and the road surface. As a thought only, praps the chair is influencing this interaction and logs a fault code for no other reason, other than unknown inputs from the chair on the ABS/CBS.
As for "feel", of your brakes, the chart attached may be of assistance.
Cheers, the can :-)
PS...sorry bout the edits (iphone troubles).