Orchid trying to escape

   

Last time this orchid flowered it did the same.

I repotted in fresh compost, standing up in the middle of the pot and quite well down in the compost I thought but it has done it again. Moved over to the side of the pot and come quite far out of the compost. The flower is nearly on the floor when stood on a low coffee table.

Has anyone and suggestions how to keep it firmly in the centre of the pot with its roots in the compost?