ok, another thing now... i noticed that when you add a new move via PrC then go to the assign animations window, the newest move is in all of the boxes that should be empty. after saving my changes in that screen (with all the empty ones with the tentacle move, even though it shouldn't have been, with only the animation changed), and returning to it, the boxes were all empty, even the one that should have been the new tentacle move, i am guessing that it re-refreshed the contents after being reopened, and since i never actually set tentacle to any of them, it sent all of the boxes to an empty slot instead, but did not refresh the contents after clicking it the first time (after creating tentacle, the anim. editor wasn't opened before that).
i checked the hex with an editor for the changed scene, and all but the tentacle id itself were there, so that is working fine, just the editor itself is a little buggy

. maybe setting it to an always empty box (instead of one of the available attacks, making a 33rd move in the anim. editor only, that only signifies an FFFF value for the attack id (not an actual move, just for the null value), so that this could be prevented) could fix the problem?
also, i know other things do this, but making a little manipulated attack editor could be helpful for when you make a new move, so that you do not have to use another editor to change the moves, it doesn't even have to enable/disable the ability to manipulate them, just the moves that can be used if it is able to be manipulated. not really necessary, but would be a nice little addition.
edit: the second attempt did successfully add the new move to the atk id in the enemy data, it is just a bug with the window. i checked the next scene i added tentacle to, and it did the same thing. i manually changed the atk to a blank spot then returned it to tentacle, then saved, but when i checked after that (window does not update until after being saved/opening a new scene.bin/changing scenes apparently), it had reverted back to a blank spot, but saved this time after switching to tentacle.
also, with your attack editor (the main window), the attack name will not be saved unless you press enter on it, rather than updating as you type it in, so if i filled out everything on a move, then moved to another scene/move, the name would not save, though the other info would.