When I followed the trail,the result came up with this: 16hyuu6MQQ1hFcs13Aqow9VKL9ecvJabcc I'm not sure if this'll help or not but I felt that it was important to tell people and hopefully help out the OP.
The taint analysis comes up with this:https://blockchain.info/taint/16hyuu6MQQ1hFcs13Aqow9VKL9ecvJabcc The two BTC addresses seem to be used more often so maybe start tracking the addressed with '2' in the branch column to find the culprit.
Since my andorid phone is the sole means of accessing my blockchain wallet,how secure is this and should I be worried or not in terms of how safe are my coins on there?
Thanks.