I understand what you mean.
Left one is the fire resistance potion(3:00, meta 8227) which i get it directly by using creative mode.
Right one is a potion which i get it from brewing.(3:00, meta 8195).
8226 8228 8194 and 8196 are normal.
But weakness(1:30, meta 8200 and 8232) are all normal.
So how to solve?