Hi! I'm new to orchids and this forum. An orchid I purchsed finally opened it's blooms and one is a double flower! It is coming off of one stem from the main branch. There seems to be a main flower and then a second flower that is using 2 petals from the first flower to complete it's flower.

My questions are:
Is this normal?

Does it happen often?

What type of orchid does this seem to be? (It was unlabeled when I got it)

Anyone's help would be graciously appreciated!
Thank You!