1. 2 extender Led's are green, both extenders got different names one is bedroom one is livingroom. 

2. I set it up ok - Plug it in on the wall, wait until the led in the bottom is green, hook up a laptop with an ethernet cable, disable the wifi on the laptop, I go 192.168.0.254 and the TPLink setup screen comes up, I chose easy setup, it searches the wifi, finds them, I chose my router's wifi, enter its pasword, set it up as an extender with same wifi name, it goes through the set up process and in the end it finishes. I disconnect the ethernet cable, enable the wifi, find my SS ID (noticing that the signal is strong now), connect to it and it says Limited Connection the INTERNET is not available. 

I troubleshoot more and on the laptop I check the IP address it gets and I see that it is getting the IP from extender's DHCP which is 192.168.0.x (192.168.0.101 in my case) but my modem on 192.168.1.x network and it's supposed to get an ip from that network from the DHCP on my main router. It should disable its own DHCP once set it up as an extender. 

In order to bypass it I had to disable the DHCP on the extenders. it works but they are still having problems registering new devices.

When I register a new device, an iphone or ipad, laptop etc.,  I have to go where the main router is and the device connects to that router's wifi then I can walk around the place and the extender works but again if I try to register a device where the main router's signal is weak and the extender is in place then it won't register it. It says no internet connection and stucks there... 

I'm sorry I was on vacation and I didn't have a chance to troubleshoot it. Today I tried to upgrade the firmware that you posted here and I did it successfully. After the firmware upgrade, I run the initial set up. This new firmware doesn't do the same SSID setup it might be due to the similar problems that I have been experiencing with it by the other customers. After the upgrade, It finished the setup but it set it up with a different SSID with the same password and it works just fine. The main reason I purchased this unit is to be able to use the same SSID when I go to the areas with weak signal points at home so it defies the purpose here but I can live with it if there is no way of setting it up with the same SSID I will use it as is. I will look into the settings to see if I can be able to set it up with the same SSID as an extender. Thank you so much for your interest. 

The main router I have is Huawei HG255s which was provided by my fiber ISP. 

Can’t connect wifi