Bitflipper makes a nice (and very accurate) comment in the thread posted in #6 above - "A lot of users get frustrated with AS (and V-Vocal, for similar reasons) because they've been suckered by the marketing hype into assuming it's a one-click automated process. Truth is, these tools are editing aids, not magic processes. They require attention to detail - and a lot of practice - to get good results. [...]"
Please realize that AudioSnap is a wonderful toolbox, but understanding what each function does, and "feeding it properly" does require some time investment. Quantumeffect's point about "meticulous" is true, as it gives you back what you tell it to do, so there is little leniency with being complacent using it.
Out of curiosity, since you are using backing tracks and recording vocals, would it not be easier for you to first listen to the original recording (such as on YouTube) to get familiar with the track?
Karl's (FastBikerBoy) video linked is very good (9 hours of material) and most of it is still applicable to X3. He also has some other tutorials posted which are extremely helpful.
@Karl - Has the SWA Complete SONAR X2 been chopped up into chapters for folks buying it? I actually did that on my own when I was learning Adobe Premiere Pro, because the resolution of the playback using the slider with Windows Media Player for 9 hours was troublesome (plus I would forget where I left off without writing it down

). I remember asking you this before but completely forget what you said now