I assume you also see the GPU's perfectly fine in the System tab, which indicates that Awesome Miner can get GPU information without any problems.

On the GPU that it's also required that the mining software reports GPU's with hashrate and more, and that is totally missing here. Could you select the miner with this problem and send me the API report (toolbar: Tools -> API report).

Did you select the miner and then click 'Map to system monitoring' ? You'll have to do this for every miner.