We are going to need some more info to help you out then, for starters a lot of the settings you are using are a preference, not a rule.
What type of hunting are you doing? What are the sites like? Are they very trashy? Are they hunted out sites that you are trying to find missed items in? What type of items are you expecting to find? What type of discrimination pattern are you using?
With those questions I will say this... If you are new to the ETrac and having a tough time with it or completely new find someplace that is fairly clean to start. Try a new park, go to some ball fields maybe even the beach if possible. You want to go someplace that is not trash infested. Not to say the place does not have trash, just not infested with it. You want someplace to start off that you are not getting multiple targets every swing. This will help you to hear good targets, nulling and even the combination of them. In all reality go dig a bunch of clad, you will be amazed what you will learn. Dig some of the iffy signals, keep an eye on the depth gauge. Mess around with coil sweep speed especially when you find a target.
Keep the machine in auto mode at first. After a while and you are finding targets, good or bad, come off of auto and try some manual. Start manual a few numbers above where the auto is. Gradually crank it up one level at a time and then hunt a while. Pay close attention to the threshold every time after you increase it. You will hit a point where the threshold will no longer be a steady hum and you will hear it waver a bit, maybe even giving a false tone every once in a while. If this happens back it off until you get better at it.
You have to also decide whether you want to hear different tones for different types of targets or just want to hear a single type tone when you find a target. PM when you hit this point or post again and i will try to help you along with that.
When doing the above dig anything that gives a repeatable tone when you pass the coil over it in both directions. Dig some of the iffy or one way tones too. Before you dig the iffy tones listen to it closely and pass the coil over it back and forth, then turn your body so the coil is passing over the target from side to side (so you now have made a cross over it), pay close attention to it's characteristics. After you dig a bunch you will quickly learn what makes the good ones "just" sound better than the bad ones.
The multi tones are awesome but they can be confusing when it comes to interpreting them from falses, if you are having some issues listen to the target in multi and single. It is a lot of button pushing but I think it is one of the things that confuses newbie's in the beginning. Also smooth can really change the target sound, you may want to go back to normal until you get the feel for the machine.
Good luck and HH. Post more once you give it a try.