Flower buds falling off Cymbidium spike

[ciaoamalfi]

Ciao! I'm new to Orchid Board, and I'm new orchid owner, too. I've always loved them, and this year I received a beautiful deep burgundy colored Cymbidium orchid for Christmas. It had two flower spikes, one very tall and fully blooming and one shorter with buds about to open. In this photo you can see both spikes:



A few days ago I walked by the plant and noticed one of the buds had fallen off unopened. But I saw that one had opened up and everything seemed in order. This morning all the other flower buds have fallen off and the spike just has the one bloom open. I love this orchid and want to take care of it, but I'm afraid I have no idea what I am doing wrong.

What might have made all the flower buds on that spike fall off so suddenly?? Did the soil get to dry? It's been humid where I live in southern Italy, so maybe when I felt the soil it was just the top that was damp?? We don't have central heating and it's an old stone house, so it stays pretty cool, especially at night. I read online that cool is good. It's not in direct light, but the room is bright. It's not near any of the electric heaters.

Any tips I might follow? Anything obvious I might be doing wrong? Any suggested reading? Many thanks to everyone for any help! Grazie!!