Output tree getting distorted after number of result lines ( number of the branches) is greater than 50
Fragment of a discussion from Help talk:Oltree format
Please ignore the question, that was a bad miss from me while reading the documentation.
Answer : add limit=500 to your query to get more results.
I got the answer from Leo . Please check the below link http://stackoverflow.com/questions/23603793/semantic-result-format-oltree-result-getting-distorted-when-number-of-query-re/