Well i have cooled off over this now. I was in panic mode when i wrote that post. I understand how this can be a feature for some, not a bug and i am now aware how to use TD properly and lock prizes so to keep this from happening again to me. I half agree with the way this is setup, but half disagree, sticking to the thought that once a tourny is done, and has been closed for weeks, it should not auto update prizes when you take out players that did not buy-in. And even if you do go in and edit prizes manually, i think the summary or a log should maybe note this edit. But not a biggy man. That's just my 2 cents worth. I will lock my prizes now and should not have a prob.
As for does it autoupdate prizes when you take out non buy in players, yes. I tested again and it did. I will attach a tourny for you to test it on. Just open the tourny, you will see it is complete, game over. Then go to prizes tab, note the payout. Go back to players tab and click REMOVE PLAYERS button. Click the CHECK UNPAID ONLY link, then click ok. Now if you go the the prizes tab you will see that it adds a third prize and changes the pay-out amounts.
In part, this is due to the fact the i edited the automatic suggested prize payout at game start (deleted the 3rd prize) to reflect the wishes of the players to have only 2 payout positions, not the suggested 3. So when i removed a player later that did not buy-in or play, it triggered another auto prize suggestion. If you wish to think that this is a bug then sure, fix it. But the more i think about it, the more i think that this can be prevented by simply locking your prizes once you have made the payouts to the players and wish this to no longer change.