No worries at all, if you are using iD unfortunately a lot of the presets for pois automatically either have no building tag on them when you want them or they have a building tag when you dont want them. I usually pick the poi from the list first and then in the bottom of the edit form under tags I use the list or text option and Ill manually remove the incorrect building=yes tag to make it an area with no building. Same for the opposite case where if you tag a building as a poi such as amenity=social_facility it will sometimes automatically remove the existing building tag, so Ill manually add it back before saving.