Issues with IP cameras and Ranger Extender

I have been going back and forth with my IP camera manufacturer regarding signal problems, off line issues etc.

For the point of clarification, my network name is Daniel, and the Extender is Daniel_EXT

The latest recommendation from their support people is this:

The issue may be with your WiFi extender. When you use a WiFi extender to improve signal strength for your cameras, please make sure it has the same exact name as the original router network. This way, the camera will choose to connect to the strongest network of the same name. Otherwise, the camera will get confused and connect to the original network that has the weaker signal strength. I can see from your dashboard that your extender’s SSID is “Daniel_EXT”. I suggest you change the extender’s SSID to match your main network’s SSID. This can be done through your router settings.

My question is, does this make sense?  Can you even name the Exteder the same as the main network?