OK, I'll do my best to address these new questions. And for the record, I never think of this forum as a "complaint forum", though some do treat it that way. The way I look at it is, we are here to help each other find answers. Some people are not looking for answers, just a place to get in their two cents. The way I see it, you don't need apologize for asking questions and I won't apologize for answering them. That's what this forum is for. Of course, some people will not accept my answers or do their best to cast them in a wrong light, but I will continue to search out answers for anything that I do not know off hand.
Let's start with this latest, "How do you put more water in the tank than the tank will hold?" It's really not that hard with abs tanks, like the entire RV industry uses. The fact is, they can stretch and contort and bulge out the bottom when overfilled.
Next: "Are the tanks not made to be filled to the top?" Yes, the are, the problem is that most people don't have the patience to stand there and check their monitor panels as it is filling up, so that they can shut off the water as soon as they get to the "top".
Next: "Are the tanks not to be traveled full?" The answer to this is two fold. 1) Yes, technically, the coach is built to handle the weight of a full tank during travel. 2) Not one RV expert or publication will recommend traveling with full tanks. Why? Because all of that extra weight will hurt your gas mileage; will have much more of a load bearing on your suspension system and tires; will cause the coach to be a bit more difficult to tow; a full RV water tank rarely stays that way when traveling - because these tanks have overflow vents by code, which when the water is sloshing from side to side, will begin to drain out and commonly will form a vacuum effect, which can drain a tank to below half full; etc.
For dry campers, the conventional wisdom has always been to fill your tank up at the last possible stop before your destination. That way you get the best towing results, and the least amount of water lost from the travel issue mentioned above.
Next: "How do you over fill a tank to the so full amount?" (see above)
Next: "How do you get more than 45 gals in a 45 gal Tank?" (see above)
These tanks get bigger and bigger every year - width wise - while still remaining the same approx. 6" to 8" tall. The tanks will bulge a little on bottom and that is expected. You just need to keep on it.
We actually started to add a third, removeable steel bar across the middle of the bottom of the tank for even more extra support. The problem is, if people aren't careful, they can blow the tank up through the floor and ruin cabinetry. This industry has seen this a number of times in motorhomes over the years where the tank had all kinds of steel below it - so it went up and caused thousands of dollars of damage to the interior of the coach. We have had a lot of support above the tanks from day one to prevent this. We figured that if someone were going to overfill their tank, it would be better to have it bulge out the bottom where it could be fairly easily repaired.
Hope this helps a little with your questions. In any case, we will be more than willing to work with you to find out exactly what is happening with your coach, and what we can do to alleviate any potential problems
ST