perpendicular position

Hi All, I have a 120 cm x 120cm x 200 cm grow tent and have 9 plant in it. 2 of them is amnesia lemon. 3,5 weeks has passed since germination. I use 1000W MH with reflector located 75 cm far from plants. But one of them behaves odd like she turns leaves perpendicular to ground. Also there are...