This seems to me the most logical answerWell guys when a plant starts off its little life those 1st 2 leaves are not true leaves but rather temporary solar panels until true leaves can be established. and to give extra time for root development .. Now those two first seedling leaves might stay healthy and remain on the plant for the rest of its life .. or the plant might relocate minerals like nitrogen out of the cells of the leaf to anther part of the plant were it is needed .. now some plants do this regardless some do it when put in a low mineral environment ... I would how ever recommend a tea spoon or two of fish emulsion per gallon for a little bit .. until you start to see rapid growth .
This seems to me the most logical answer
Watering might have been the issue because of the magnitude of the root system at the time i was watering to often as the roots developed and i decreased my watering lightly and it seems to have worked. Or they were just the cotyledons dying off and displacing nitrogen.only if you don't know what your looking at....... too wet or under fed, or underfed because its too wet. if the roots are drowning they cannot take up nutrients to feed the plant..... those are the first set of true leaves in the pics, but the discription of cotyledons is kind of right