Thats bazaar as with the previous version firmware you could get as many as your radio had. I have only tried with my DX8 via satellite. This is true though if you are using the sbus adaptor. I am still not convinced that the A2 is suited to Spektrum. I have given up with mine and am waiting for a response from DJI to their admission that there is a problem. They have the video evidence and promised to sort it out, that was before their new year break. I have not heard diddly squat since.
Dave