It’s a known issue already for a long time. Especially when trying to raid players without an alliance. When the message is that a player is under siege however, some keep trying till the raid is over. The player who actually did raid him can raid immediately again, leading to longer waiting time even. And then when you can raid, the one reacting fasted will be able to raid and lead to same message again.
Anyway, you get my point.
I agree the message should be different, but there can be a long waiting line also due to this, when multiple players keep trying to raid same player.