Key Command troubles: Set Region/Event Start to SPL Position not working?

Question

Hello,
I'm simply trying to find a key command that will allow me to move regions quickly from one part of a song to another without dragging with them with the mouse in the arrange window. I thought I found the solution with the key command "Set Region/Event Start to SPL Position", however it doesn't seem to be doing anything!
Here's what I've tried: First I select the region I want to move, then I move my SPL to a location using the "go to Position" key command and typing in a bar. I then try to use the "Set Region/Event Start to SPL Position" key command (which I set to Shift-Control-L) and nothing happens. Shouldn't it be moving my region to the SPL? Note: the region is still selected, but refuses to move. Am I doing something wrong? Is this not what this key command was designed to do?
In my attempts to get the darn thing to work, I also discovered that lock screen-set (Shift-L) key command also does not seem to work (it is not toggling the black dot after the screen-set number like usual). Does this mean my key commands may be corrupted? (which would be a real drag!!) Oddly enough, these are the two are the only two that do not seem to be working, as all others seem to be working fine (AFAIK).
I've had this problem in the past with the lock screen-set key command not working, and rebuild all key commands and templates when I upgraded to tiger. I thought everything was working fine!
Any advice would be greatly appreciated! Thanks in advance for your help!!

Answer 1

I assigned F5 to two functions. In the key commands
window, pressing F5 highlighted the first assignment.
Pressing it again highlighted the second assignment.
So just keep pressing the key to see whether it's
assigned to more than one command...
Well, now when I type "Shift-L" into the finder in the top right of the key commands window, no key commands at all are show. However, which I search for the word "lock," the lock screenset key command comes up as "Shift-L." Oddly, if I search any other key commands (such as F1, "cmd-k," or even other shift ones like "shift-," the associated key commands show up.
To test, I changed the screen set lock from Shift-L to "opt-ctrl-L" and it now works again. However, it still will not come up in the key commands window through searching by "opt-ctrl-L"
On what may be a side note, the search feature seems very buggy! Tell me if I'm doing this right: First I open the key commands window, which opens with nothing selected. Now, in order to search by key command I go up to the top right corner where the magnifying glass is, place my curser inside and type in the key command correct? When I do this, it shows me the highlighted key command in the left, and my curser is no longer flashing up in the magnifying glass, correct?
Now, in order to search again, I have to place my curser in the search field again, right? However, now when I search by key command, not all of them register! For example, my "go to position" key command is simply ; but when I type it, nothing comes up in the search, and instead of the magnifying glass window being blank like before, the actual ; is in the box. Oddly enough, searching with "Cmnd-K" still works!
What is going on? Am I doing something wrong? How do I fix this, as it is very frustrating!! thanks again for your help