Two Different flower in one spike of Phal

[abhijit]

One thing is astonished me. Today morning I saw two deferent types (actually different colour shaded) flower in a single spike of a phalaenopsis plant. I have no previous experience like this. So I think about it and one crucial point is knocking my mind – I purchased this plant 4th February 2013 from a reseller who imports this plant from Bangkok. The plant was then with two flower buds. When I brought it in my house the season was let winter and temperature was below 120 C. at day time. One bud flourish then which was dark in colour. The second one opens its petal today and now hare the temperature raise 33.90 C. at day time. So is there any possibility for this type of colour change as a result of temperature and light changes?
Here I attached some photos.