Could it be because of the API, which automatically updates the balance at source of the data, and that's why the post does not appear as edited on the forum?
Correct:
[code][img]https://bitcoindata.science/api/addressbalance.php?address=bc1qfqd0mqhws95d5q2rv6cgeqyr7cyxd4slltg7ze07wt42x0xg7q5q9l55a0[/img]
[/code]
The image needs to be generated when Bitcointalk's image proxy asks for it, and that doesn't always work (or only after a while).