Self topping mutation?

This week has been going slowly, but its getting a little bit bigger day by day. It does seem like the 2nd set of leaves is taking a bit longer than what i tought it would. I used the last 250ml water-mix from last week. Day 16 update - It doesen't seem to be shooting new leafs, just at little "something". I haven't seen this happen before. Day 19 update - Finally some sign of new leafs forming. It seems like 4 new leafs in one set, which i haven't seen before. Very interesting! Day 21 update - I might be wrong, but it seems to be like the plant self topped by mutation? Correct me if im wrong