Ohh I think I know what you mean now. Change that dropdown to Character Select (to let you log in to character select) and that will cause the patcher to get an updated list of your characters -- that information is saved so it's going off the old pre-merge character list.
As for not having maps, if you're logging in that way and go to character select, you should have maps. I'm guessing the way you were logging in that wasn't having maps was via a different shortcut which I would be willing to bet is a different install of EQ2.
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