Curly leaf, a little help here people?

[Sammy]

Hello ladies and gents.

I could not leave this baby at Lidl's yesterday, amongst a lot of standard phals with their roots sitting in water. I saw a pretty pattern on the flower and then noticed the flowers are semi/half or pleoric (what ever terminology you prefer) i had to have her.

As we were walking to the check out i noticed that one of the leaves was not just being pushed up by the packaging, it was curling under on its self.

(I have repotted and taken away all the nasty sodden media and roots)

Does anybody know what causes this, or how i can try to ammend it?

Thanks a lot.