Bluetooth dongle over usb extension/hub - can't use headset as audio input

I've been attempting to extend my bluetooth range by using a usb extension lead (with built in repeater) so that my bluetooth dongle is in the center of the house and thus maximize coverage, at first i had no problems at all -> i can send and recieve files using my phone and use my bluetooth headset (avro) as an audio output device and this all works fine and dandy BUT i cannot use my headset as an input device. There was another user who was having the same problem but they were using a usb hub.
There is a small fix to this -> don't use extension/hub but plug the dongle straight into a usb port on your mac, but this doesn't really help at all as it means i have to be in my room and can't use bluetooth over the rest of my house.
Is anyone else having similar problems and know of a way to fix it? I thought maybe the signal wasn't strong enough from the microphone, but even if i'm right next it doesn't work.. Maybe if i used a powered usb hub that would boast the usb?
Just to add, this is not a firmware problem or not pairing problem-> when dongle is connected directly to the mac it works fine, but when it is via the extension lead the sound bar doesn't change when i select my headset from in sounds output menu

I've plugged the extension cord into the usb 1 port on my keyboard (apple = genious) instead of the usb 2 port on the side of my emac and it works PERFECTLY....
Whilst this is odd, it works so i'm leaving this up incase anyone else has this problem

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