When I Merge two main menus, the names are not overriden as I would like to be:

for example:

Code:
menuA:
File Edit Help
a1   b1   c1
a2   b2   c2

menuB:
Help
c3

menuA.MergeMenu(menuB) should be:
File Edit Help
a1   b1   c1
a2   b2   c2
          c3

but instead, I get:
File Edit Help Help
a1   b1   c1   c3
a2   b2   c2
Why is that? How do I get the desired behaviour?

Thx!