I have one more suggestion...

There is another digestive issue, that causes gas, bloating and diarrhea... it is fructose intolerance.

Most of the yogurts have sugars in them. Even the Kefir flavored ones. One in 3 people have fructose intolerance and will react to the sugars in the foods you eat. It can be very difficult to nail this. If some sugar is consumed with food, it can blunt the reaction. But when taken ALONE, that is when a reaction is more likely to happen and be identified.

http://en.wikipedia.org/wiki/Fructose_malabsorption

I would expect the coconut milk yogurt to be difficult for fructose intolerant people. One hint, that can be historical is an intolerance to apples, apple juice and pears. In fact had I known this years ago, I would have been more comfortable myself. I cannot eat pears... never have been able to tolerate apple juices either! I discovered this for myself a few years ago. Since then I've avoided my triggers and have been much better.

For yogurt I use Carbmaster, from Kroger's, which has only 4 grams of sugar. I use the unflavored Kefir.