Ah ok, i think i got it.
Well, obviously anyone prefers to have clean, correct dumps, exact to the original. If that is really the case the new, 100% exact dumps (good dumps) should be added and the older ones renamed (with [a boot sector] or [b boot sector] maybe).
At first i thought you're saying that you normally "fix" the sets after dump, altering something (so they are hacked sets), now and if i did understood correctly what you said is that you're able to dump correctly your disks and get 100% exact copies. Some of the sets currently in TOSEC are not and to be equal to yours need to have the boot sector altered.
I'm sure Aral will be interested in talking with you, he is more into this and i don't dump anything so can't comment much more, lets just wait until he says something