I love using dynamically named ranges to keep up with expanding spreadsheets,
but when I want to make a change to a named range (for example, expand the
OFFSET function to include 2 columns instead of 1, or to start at a different
reference cell), I get one (or several) of the following problems:

1) References to the edited named range stop working, although the name is
the same (the worksheet that is listed to the right side of the top box
disappears when this happens)

2) Instead of updating the original name, it makes a copy and now I have 2
"names" (and my charts, etc. keep referring to the original).  Again, somehow
the worksheet association disappears.

3) Occasionally, my entire OFFSET formula disappears and is replaced by
=$B$12 (or whatever cell was selected when I did Insert-->Name-->Define).  
This happens AFTER I type in the OFFSET function and hit OK (so I don't see
that the wrong formula is there until I go to troubleshoot and find it.

Does anyone else have trouble changing existing named ranges?  Any
suggestions for how to make them behave better?

Thank you,

Heidi