Mutiple AC750 range extenders on one WIFI network - how to configure

I have purchased two AC750 EX3700 wifi range extenders. Configured and connected the first one easy peasy using WPS and it works a treat.

Went through same process with the second one and a) the extender doesnt show up in the list of extenders but I think the extender name is the same as the first extender (i.e. NewtorkName_2GEXT). b) when you come into range of the second extender device picks up that extender and you lose internet connectivity.

My question is, can you have two of these extenders on the same network and if so how do you configure it.

I tried to factory reset the second extender to try and set up through the browser but it just insists on reconnecting to the network router and blocks internet access. As soon as i power it down the first extender is available again anad has internet connectivity.

Any help on this would be appreciated and apologies is this has already been covered elsewhere a thousand times.