Marvin,
I did understand your original questions, though perhaps did not explain myself throughly enough, my apologies.
My own take on this issue is that legally, an admission to a 'mistake' or an apology for a mistake are bound together is a bond of liabiblity that the WTS, or indeed any other religion of Corporation, can only afford to unravel at the cost of a legal precedent.
I used an illustration with my Bank to show how this works in practice. A mistake was made and verbally admitted to, but an apology refused. I have known of two similar cases where the WTS has paid compensation to individuals specifically without admitting a mistake in writing, or issuing an apology in writing but accepting verbal responsibility. The payment of compensation is the legally safe method of dealing with the problem without setting a legal prority.
I have never seen the WTS admit a mistake in print. The admission to fallibility, or past punishments by God, are not really an admission of mistakes. The WTS calls them 're-adjustments' and by definition then blames God for making them, as they are only his 'vessels'.
However, I have heard a member of the GB verbally admit to errors of understanding, and a WT last year admitted that the WTS had been 'misinformed' over a number of doctrinal issues in the past. These statements fall well short of admissions of error and certainly could not be legally defined as such.
Hope that this makes more sense - HS