Actually...now I know this is going to sound like an excuse...but it really is true. The software I use is supposed to be run on a computer with 1GHZ dual processor. Mine is a iMac G3 400Mhz. So it causes an extreme latency issue. So when I am trying to sing to the guitar track my voice echoes back a little bit after I sing it...really throws me off. lol Hopefully I can get a newer computer to solve the latency issue. Although I am sure with time I will get better at my timing...but if you listen you will notice the bass is off some too....and if you heard the guitar to the click track you would notice the guitar is off.
As far as the bass frequency I agree with you completely. But, I have yet to figure out the EQ on the software I use. (Cubase LE) I am familiar with your basic amp EQs which are just High, high-mid, low-mid, Low. But on this software each of this setting has another 3 settings. I have been trying to figure it out.

Hopefully I can fix it.
I will consider not holding the notes so long...but it sort of my thing...and I am not sure I want to change it or not. Hopefully I can fix my pitch issues, but when I listen to my voice it just doesn't sound ascetically pleasing. And I don't think it is just pitch....so hopefully I will either get over it or learn what the issue is.
Thanks for listening and for your feedback.