how many beeps

I think this is correct.

The first beep is a given, letting you know you're approaching a camera.

If traffic slows and you stop before the camera, you will get an additional beep each time you start moving again until you're past the camera.

Could this explain your findings?

As CraigW said, if you stop and go many times , it will beep again and again until you pass the camera location. If you move continuously without stopping at all, it should beep only once. If it beeps many times while you're constantly moving pass the camera, there may be multiple POI entries at that location.

Oh good... I'm not loosing my mind! Thanks!

On our Garmin models, if I forget to load an audio file with the POI, or forgot to load sox.exe in right place, the Garmin doesn't 'see' the audio for the POI, and therefore beeps. At lease that was what it was here

Files with key words or numbers in the name even individual pois with numbers will sound the bong defult alert.Without a sound or sox.exe file installed or setting PoiLoader in manual mode.
"POI Loader determines whether or not a file contains speed and proximity alert points based on specific criteria. Use the following information to help you create Custom POI files:

If a file name contains a valid speed number or if all records in a file have speed encoded in the name, then all records in the file will include speed and proximity alerts. For example, a data file with the file name "Speed_30" generates speed alerts of 30 mph (or kph, depending on the type of units selected in POI Loader) for each POI in the file.

If the file name contains "redlight", POI Loader assumes all records in the file have proximity alerts with a distance of 400m/0.25 miles.

If a file contains "GATSO," "mobile," "SPECS," "safety," "speed," or "camera," but does not have a speed, POI Loader uses a default alert speed of 0, which means you will always be alerted. You can override this default value by entering the speed in Manual mode.

You can also enter speeds for each POI individually by adding the @ symbol and a number after the name of the POI. For example, a Custom POI named "Ridgeview@25" would create a POI named "Ridgeview" with a 25 mph speed alert.

POI Loader calculates proximity alert distance based on speed. You can enter proximity alert distance for individual Custom POIs in a .gpx file. You can also enter proximity alert distance for all Custom POIs in a data file using Manual mode".