It took me forever to find a tutorial that explained why the thumb gusset was so aggravating, but I finally found it here, The Thumb Gusset| Mind the Gap.
Thank you to, "Inside the Insouciant Studio" for explaining this so well!!!
So, now, when I remember to bring my knitting home from work (yes, I need to knit at work. It keeps me calm), I will re-write the mitten pattern so that you will have something wearable!
More to come.
Also, I need to block my new shawl pattern made with the lovely Mink Yarn. I'll post pictures when it's finished.