In the past I have seen people with doubble strapped flex's and I dont think there was any problem with them. My teammate had his flex doubble strapped and nothing was ever said to him.
As far as the soft ears go.. I couldnt tell you what they deem legal for soft ears. Ive seen people get away with really good soft eard profilers, profilers with soft ears(done very ****ty, soft ears were all cut absoluty horribly) Thats what I have seen and I dont think there was a problem with any of thoes. I dont know what they would have to say with thoes because they are not a major companies own soft ears, like JT or Event soft ears. Hope that kind of helped.