Thanks Dimiter, I suspected as much.
It turns out that 2 of my tabs use identical context menus, so I thought I could consolidate them and initialize in the main page as you suggested. I then tried to change the target of the menu within each partial view, like so
menu = $(
However, this only seems to work for one of the grids. The alert shows the expected target in each view but only one shows a context menu.
Is this an acceptable way of switching the target of a context menu? Obviously, There may be some other error in the page that I haven't tracked down yet, but I just wondered if it was valid to switch targets post-initialization.