I am not sure about all the pics but the one on the bottom left definatly looks like bubble. The two week veg is a good thing - the power of hydro lies in the short veg time. You might want to consider flowering soon if you are trying to keep the height down (let the plant grow two or three more inches max). The plants will grow a lot taller during the first few weeks of flowering. Another good reason why you might want to flower early is that a 250watt does not have a ton of penetrating power. If the plants get too tall, your buds at the bottom will not get enough light and they will end up whispy. I hope everything goes well! Peace.