HarleyD, I believe you are failing to distinguish between the Heavenly (but real) throne and the earthly throne.
Please consider the following...
“And Jesus said unto them, Verily I say unto you, That ye which have followed me, in the regeneration when the Son of man shall sit in the throne of his glory, ye also shall sit upon twelve thrones, judging the twelve tribes of Israel” - Matthew 19
Please note the following:
1. The time referred to is after the 2nd coming, after the general resurrection
2. Future tense “shall sit in the throne of his glory”. The clear implication is that there is some future throne waiting Jesus.
Jesus already reigns with all power is heaven - but at some point in the future, after the 2nd coming he will sit down on an earthly throne in Jerusalem and, with the 12 disciples, rule over the 12 tribes of Israel.
I think that is a fair point and an interesting observation. Are there two thrones; one in heaven and one on earth? I would tend to say no and I would point to this verse (among others).
and again...
Mat 23:22 And he who shall swear by Heaven swears by the throne of God, and by Him who sits on it.
This touches on something that I, quite frankly, have never figured out-the physical and the spiritual. Satan is a physical being roaming around like a lion, but we don't see him. Likewise we know angels are everywhere. Indeed, we are told in scripture that we might treat them "unaware". Yet we would call them spiritual beings. There is no indication that the garden of Eden was ever destroyed, and every indication that it still exist guarded by angels, but where is it? We even know the general whereabouts but can any of us find it?
I bring this up because I don't think one can clearly distinguish from the "spiritual" and "physical". They appear to be intertwine like different spectrum of light. A slight shift in the wave pattern and one has a completely different perspective.
Just because we cannot see a physical throne going from heaven to earth does not mean that a physical throne doesn't exist. Christ was physical but upon His resurrection would appear and disappear. (I might add He did this before His death as well.) How we will be in our glorified bodies is difficult to understand. Somehow we view ourselves as we are now, walking around on some celestrial cloud. I'm not sure if that's the right perspective.
A physical throne reaching from heaven to earth right now doesn't seem to be all that preposterous when we can't even find Eden located on the Tigris and Euphrates.