If dual bladed sabers are enabled & a user is using it, then the server disables it, the user is stuck with the dual bladed saber. This probably applies to dual sabers also, but I haven't tested it.
Either the CVar should just disallow use (& not disabling it) of dual sabers/dual bladed sabers, or all clients dual bladed sabers/dual sabers should be disabled.
An Interesting Point. never tried it though, dont use staff or dual. its the Old School single for me :p