Point taken. My rear breaks are still good so that'll get me home tonight. I only used the shifting cable on the front because I had to replace the bolt that clamps down on the cable and I didn't have any other cable left.
So looks like I have a big project ahead of me. Replacing my whole rear drive train and now I am going to re-cable my bike because according to Sheldon Brown I did it all wrong. And it would explain a lot of the mysterious issues I have been having with my shifter. Like for example sometimes I'm trying to shift up or down on my rear and there is no tension on the shifter. I attributed it to being old and going bad so I'm upgrading. But if it's a problem with my housing and routing of the housing then that'll be interesting.