i am no expert..but you cut too early..i never experienced that kind of problem..but i have seen my friends blood python eggs with that kind of 'yolk' pressed up to the wall..and he just let it be and cut after day 60...and you know what,actually that thing does not look like egg yolk to me..for me,its more like infection which prevented from entering the eggs..its kinda mechanism to trap pathogenic microb from entering the eggs..just my opinion based on observation..
Hope your eggs will be ok..![]()