Alert Problem

I have a rule that says: HOST=* SERVICE=* EXSERVICE=msgs TIME=W:0750:1710 COLOR=yellow,red,purple MAIL me at myemail DURATION>10 REPEAT=1h

I have another rule that says

HOST=* SERVICE=msgs TIME=W:0750:1710 COLOR=red,purple MAIL me at myemail DURATION>25 REPEAT=2h

The problem is that on the info page for a host, it shows both of theses rules for msgs:

Msgs me at myemail 10m - 1h purple,yellow,red me at myemail 25m - 2h purple,red

How can I properly use the EXSERVICE tag to get what I'm wanting?

Thanks, Michael