Thanks for the reply Remy, it seems that the unit measurements for point locations is different than the scaling used for vectors drawn with the Analysis Visualization Framework. So, I had two point locations, I subtracted the two to get a vector and drew that vector starting at the base point... it went in the right direction but was totally the wrong length. It pointed towards the second point but did not end at the second point.
While the base point location of the vector was correct, the length of the vector needed to be adjusted to the view scaling in order to have it connect between the two locations. My view was scaled at 1/8" = 1', so what I expected to be a 10 foot long vector was turning out to be 80' long. If I left the point location intact but scaled the vector to match the 1/8"=1' scale, I ended up pointing from and to where I wanted.
