Did it. No cigar.
Theory
Some program / memory identifies the old text as superior to the new one and "corrects" the new one by turning it into the old... This appears to be logical from a computer.
(The actual difference between the two texts is accent marks on ceratin vowels. Like, in Hungarian, in the old text I left the letter Ő as O - then later re-wrote it in the correct form. That's the new text.)
So, how can I expurge the old text...
Or give up?