WinCC - Alarm logging: acknowledge tag

I've created 4 messages in the alarm logging for an analog measurement. A message will appear if the measurement is alarm high, warning high, warning low and alarm low.
In the step7 program there is a bit 'QUIT' that when setted the event state(32bit) of the groupstatus in WinCC will change. So that it can be visualised that there is pressed on the acknowledge button.

Now my problem. I put in the alarm logging in the acknowledgs tag colomn the name of the structure tag of the analog measurement and ".QUIT" behind it. This for all the 4 messages I've created. When I check the ".QUIT"bit of that structure tag in WinCC it is only set for only one message that comes up. In the other 3 messages WinCC won't set that acknowledge bit.....

these are 4 different messages so in my oppinion it doesn't matter if the acknowledge bit is the same. Am I right?
What could be the problem here and how can I solve it?

thanks!