Update: Added an additional case where the same question could be asked. It says in Shulchan Aruch 208:12 that when one makes an after-bracha after eating food for which the fore-bracha was "mezonos" ...
Normally if you have wine and refill your glass during the meal you don't make a new borei p'ri hagafen. Why do we (at least Ashkenazim) say a new b'racha for each cup at the seder? I think I've ...