Hi all hope is all is well  I have a question regarding my tplink re450

1.  When i done a firmware upgrade which is part of the package it has for somereason changed the model to a re550

2.  Why is it when i connect directly to my mifi device I can get speeds at around 200, 220 Mbps but connecting to the extender i can only get 90 to 110Mbps

1. I have no idea

2. I have done everything I can think of to try and rectify this wifi network noise.  I tested this though the tool supplied by tplink called WIFI Toolbox

    Does this tool show noise from the extender to the router or does it show the noise from the laptop to the extender.

I have connected everything to the tplink so its all on the 5ghz bandwidth, and i have also disabled the 2.4ghz setting as it isnt being used by anything here at home.

the noise chart that is provided showed the following

-93Dbm

and two rainbow lines

one is the extender

the other the mifi

the extenders wave peak is around -60 and the mifi is around -79 they both run underneath each other like a double rainbow.

CO channel interference 1.   What ever that means.

I hope someone can shed a light on this for me thanks