No, if the facility to biamp or biwire is available, you should be able to connect them properly. I agree with Alan on the point that it confuses most people, and causes dissatisfaction when it is not connected properly. As he mentioned, you most likely have done no damage, but have created a phase problem.
Your best bet is to simply connect them without biwire connections, and make sure everything works. Biwiring may work, but lets make sure it sounds proper in regular wired mode.
The concept of biwiring and biamping has a basis in the designer "splitting" the crossover into 2 independent modules, and providing separate external connections. They are connected normally, and a provision to break the crossover into 2 modules by removing a connector is included. For biamping, this can mean you are able to drive the 2 modules and respective drivers with separate amps, or biwire - connect separate cables at each connector that are joined to the same amp channel. The main premise is to isolate the crossover sections and eliminate distortion. Remember, crossover networks are electronic components, and are subject to all the properties of such devices. They are made up of, but not limited to resistors, capacitors and inductors. Biwiring also changes the "network load" on an amp, as a cable is also a complex load of the above values similar to a speaker and crossover network.
As Alan states, the benefits are an area of much discussion. It very powerful, specially designed systems, the effects are noticeable. For most of us humans, the debate rages on. Biamping is another matter.
I got your private message, and will respond to it as well.
Regards,
BBIBH
