Again, I would have to be convinced that a group containing more than two objects with sizes within an order of magnitude of each other would be stable. Myself, I can't see it. Two large moons would push each other into chaotic orbits which would, sooner rather than later, lead to either a collision or an ejection.
The only way I can see a system with two large moons is with a planet that is completely dominant, such as Saturn or Jupiter and it's moons. (I'd argue, for instance, that Earth could not have held on to two moons.)
But these questions can really only be answered when we have more binary-planet candidates to categorize.