Thanks Mathew for help. Appears that I found the problem: as part of the list
of values, I had a link to the input cell (I was trying to get data that
surrounded (+/-)the input cell: b5=b6-1000, b6=input cell, b7=b6+1000). So at
first I thought it was the formulas. Instead, it's the link to the input
cell. Looks like this confuses excel as it generated incorrect results in the
data table. Once I eliminated the link, the calculations worked.
However, this leads to the question of whether you can include a link to the
input cell in the list of values? In my case, it would be useful in
immediately seeing some sensitivty charts (based on the data table) without
having to manipulate the list of values to "surround" the input cell.