Kevin,
Some things I noticed in Test2:
1) You can not scroll with the mousewheel, Page UP or Down
2) You can not move with the up/down arrow keys over the items
3) Trying to move with up/down arrow keys, you move the items of the combobox, and not even the one of the currently selected row, but whichever had the focus (when you click the HyperLink, if you click the checkbox it will activate the row combo, if you click the button, pressing up/down does nothing)
Those are the first things I noticed
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges