The game is scripted in a way that rules may be overcome by owning a very high initiative.

+10k initiative means you go on by one move. Very likely something like +50k means a not prompt move becomes prompt and +100k means you move before even buffs are applied.

What very likely happened to the opener is that his enemy had his best equipment in move 2 due to the fact he moved the gear during the time without being aware of it and refined his real move 2 equipment, so that his move 2 was 10k initiative higher than the move 1 of the op. Something like 16000 vs 5700.