After 4 pages of response, I looked to the original subject title: (Player was not aware of raise amount. How should TD rule?)...The player was not aware....hmm, so because of Accepted Action; we are expected to either force the calling player to call the correct amount, or at least surrender the "short amount" they were willing to call?

Somehow, this does not serve the best interest of the game. I'll go back to comments from others on this subject..."something about this reeks!"
Come on TDA members, let's fix this one.
On Day 1 of the 2011 TDA Summit, Accepted Action was introduced. My first impression was; it was so ridiculous that it would never pass. As the debates and suggestions wore on, I began to realize that somehow, this rule was going to be added.
On Day 2, after more heated debates, (and the addition of the right to use TDA Rule #1), we were asked for a show of hands "if we could live with it"... for now? It was apparent that we were running out of time, and we had other rules that needed to be addressed. The new rule was introduced.
Since that Summit, Accepted Action has proven to be the most controversial and debated rule in the history of the TDA. I hope that some of the suggestions for change are seriously considered at the next summit.
The accuracy of every bet is the responsibility of the dealer to confirm. Ken mentioned; the dealers that fail to count down a stack, and just spill the chips into the pot! This is where the problems begin...the incompetent dealer. The correct dealer procedure would eliminate the need for Accepted Action.
When action is head to head: Player A bets 500 and player B insta-calls. Player B should be responsible for the exact amount pushed by Player A. (because he did not ask for confirmation). If Player A makes an unclear verbal declaration, that is a different problem. If we try to break down each possible situation, we will realize that chips in the pot is the safest way to get an accurate understanding of the intent of the bettor. Most situations that we face, in every day poker tournaments, do not involve hundreds of chips being wagered on a single bet...most of the time the bets are easy to asses, visually.
The correct count must be confirmed on every called bet. Period. In multi way pots, where a bet amount is unclear or a request is made for clarification, the dealer should stop any further action until the correct amount is determined, then, and only then, will action proceed. Why not? It has to be counted why not upon request?
I think everyone knows how I feel about Accepted Action. What surprises me is the way some of our members are weakening on their original feelings. After a year and a half of Accepted Action many have found a way to accept it, even though you know it's unfair. For the record: I was the one that opposed Accepted Action at the 2011 Summit...the only one!