Sounds like the fire og hermied deep within the buds...if seeds are not developed it hermied late in the game. did you do something out of the ordinary around week 5-7? possible light shining on them? taking pictures with the flash on in the dark? insecticides? light changes? flushing? the white seeds are obviously premature seeds. if there are only a few its not that big of a deal. i have rogue seeds here and there from rogue pollen. i do breed and this tends to happen from time to time. take out the seeds and fire a bowl. no big deal. only the calyx that supported the seed is affected (losing potency), all surrounding calyxs are just as potent as they would have been without the neighboring seeds. some strains are more apt to go hermie than others. to prevent this, realize which strains do hermie and how easy they hermie. cut down on environmental stresses like light changes, nutrient changes, temperature changes. maintain the ideal conditions and minimize stress. do all the big changes in veg such as transplanting, insect treatments, nutrient line changes, topping, high stress training, removal of foliage, addition of lights.