I just started a new Petite Shiraz kit 2 days ago. It is not acting like the first 2 kits I have made. The air lock is not bubbling away like the others did at this stage of the process. I know it is doing something, because when I lightly tap on the lid, it will "burp". The activity seems very slow. I started this one exactly like the other two, with one exception...I pitched the yeast after I set it on the top shelf. The others, I pitched the yeast, put on the lid, and then wrestled it up to the top shelf. Could the lack of stirring have caused the yeast to start more slowly?