They're not elegant plants and always look odd to me. Yours doesn't look any odder than the rest
Those are the flowers Southern Girl. If you don't want it everywhere, cut them off before they form seeds
a Carex pendula that size should be flowering now but we can't see the top of the plant
agree with ladybird, less sun. and don't over water
it might be a willow herb but not Rosebay WH. Grat WH maybe
If it's in a tight clump it's unlikely though.
I've been nut for a long time Kitty. It seems appropriate.
and Special plants
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