They may very well be able to do so...but each table could be in opposite corners from each other. The only possibility of this working is to speak to the DR manager or someone at the restaurant.
I imagine that you will have to call...nobody here is likely to be able to help without some very specific details about the finances...which I personally would not post on a forum.
That's the first I've heard of a "counter-offer". I was under the impression that you just made your bid and waited. You can always "up" your bid after the initial attempt. This is what we did for the transatlantic that we are currently on, but we never got any counter-offer or invitation to bid more. (We did not win the bid.)
Did your counter-offer have specific information regarding your *first* bid? It may very well have just been a boilerplate email trying to drum up more bidding.
Not sure if this is what you mean...but don't go into the "web version" on your desktop/laptop/tablet. Just go into the travel information tab and enter your flight details there. This is the way that I have always done it with no problems. If this is what you are doing then I don't know what the problem might be.
Don't forget that adding a package pre-cruise will affect your insurance balance (you *did* elect to have insurance, didn't you?)
Insurance is a percentage value of the entire cruise fare, and you have "upped" that cruise fare.
I am jealous that you got over to MoroBeach! That's been a bucket list item for me for a long time...but it sounds like it's not the treat it used to be without a 747 screaming over your head at 50 feet!
(The group I am with have no interest in that...)