Kneeboard keys list vs options controls button and key list

When I look at the list of command assignments listed in the kneeboard under Keys and compare it to the listing of key assignments under the options,controls,buttons and keys, they are not the same or even close in many cases? For example there is no listing for the zoom command in the Options list but the zoom commands are clearly listed on the kneeboard list (and work as described)? I have reset the controls list to default with no change.

There are many differences but I thought if I could understand the zoom difference it might explain them all. I did a totally clean 2.5 install and have applied both hotfixes.

Terry