Hi
1 / It is possible that you have the Volume Threshhold for the plataform you are testing in set to that amount. In order to check this, go to Project > Project Settings... > Under the General tab you can see the volume threshold for each platform. Check they are no set to -45 dB. If they are, sounds under that will behave as defined for each object (or answering to hierarchy) in the Advanced Tab on the Property Editor.
If this is not the case, the I suggest you use the profiler to fin out what the issue is. I'll be here if you come back with some more info on that (or if you have trouble using the profiler).
2 / Just as in 1, go to Project > Project Settings > and under the General tab you can set the Max Voice Instances for each platform. You can also control mas instances for each game object by going to it's corresponding Advanced Settings tab in the Property Editor; from there you can also control their behaviour.
Is that what you meant? Or is it on how to change the visibility of the profiler? Be that the case, in the Profiler go to the Top-Right on the Performance Monitor and click on Settings. Once there, you can change the Graph Max and Min for each parameter (if you don't see this column, just enlarge the window by dragging from it's right edge).
3 / I don't thinks that's possible. Just checked through some of their tutorials and it doesn't mention it, and I didn't find any path into it within wise.