One time there was a flash flood watch for my city and the neighboring county, that's 2 alerts, then it kept repeating about every 10 minutes.
Certainly with the flood alerts they need to reevaluate how/when the alerts are sent out. The NWS will frequently extend flood alerts by 10-30 minutes at a time over the course of a storm on how fast the storm is moving through an area. The CMAS system will send out new alert for each update by the NWS regardless if it's just extending the previous alert by 10 minutes or ("It may flood in the next 30 minutes? Okay thanks. I can see that it hasn't yet stopped raining an hour later, it's not necessary to send me another frigging alert saying it may flood.").
The lack of foresight into the deployment of CMAS is going to have a long term negative effect on the effectiveness of the system. I know a lot of people in VA who have disabled the system on their phone after receiving half a dozen alerts between midnight and 0600 during the last big storm. They'll probably never think to re-enable it now.