[r9etb]

If an object typically has an elliptical orbit of some random eccentricity, sometimes the major and minor axes just work out to be nearly equal.

Huh?

The problem is not one of "randomness," it's one of orbital mechanics.

[Netheron]

So two bodies can't have a gravitational interaction which throws one off of the plane of the ecliptic and just 'happens' to also have a circular orbit?

We've only got one body here to go on. If it was an entire accretion disk remnant (lots of co-planar bodies in circular orbits) off of the plane of the ecliptic, then we'd have a major theory malfunction.