EX8000 Extender ReadyShare Address 192.168.1.250 and only 1-5G band

I installed the EX8000 extender and have a few questions about the wireless 5G READYShare connection from  192.168.1.250 and number of 5G bands.

 

I am connected to the router at 192.168.1.3 and use this address to login and setup the extender.  When I enter the 192.168.1.250 address into my browser I always get an error that states address not found. However the router lists 192.168.1.250 as a wireless 5G readyshare device.

 

Questions:

1. What is this readyshare address's use?  I do not  have any USB or readyshare devices.

2.Since I am not using readyshare or cannot use this address to login,  can I disable it?  If so how?

 

3. I purchased the EX8000 for the tri-band but in extender mode I am only allowed to setup the 2.4 G and one (1) 5G band.  Both 5G bands on my router have different names but in EX8000 I must choose only one.  Am I missing something or am I right that in extender (same name as router mode) I can only setup 1-2.4G and 1-5G band and must choose one?

 

Thank you for your help and explanations