So I bottled 220 187ml bottles of Niagara yesterday. There is approximately 3/4 of an inch headspace per bottle. Within minutes after corking, many bottles corks began to rise out of the bottle about a quarter inch (none popping off). I pushed the corks back down, but many gradually came back up. Cam anyone diagnose why this happened and what I can expect/do to prevent corks popping off? I sorbated the wine about a month ago so there should be NO active yeast. Also, I degassed the wine by stirring a month ago. I believe it is a combination of the smaller headspace and the carbon dioxide trapped in the wine forcing the corks up. Am I ever safe at some point if they still haven't popped up? They are currently stored in my basement which is currently relatively cool, but I'm afraid they will explode when transported to a warmer environment. Please help with any tips on salvaging the wine!