My account is setup so several tasks are added when a new project is created from a project template. 

I have integrated Zoho Project with my Google Apps account so the new tasks will be added to my Google Tasks. However, when tasks are added in Google, they are not added under an existing Google Tasks List like it is with Zoho CRM.

Instead, every project milestone creates a new task list in Google Tasks. Then the tasks belonging to the milestone are added under the new list. 

This is a problem. I want all the new tasks to be under one existing list. It's a big problem to have multiple tasks to track and new ones added every time I create a new project.

Please advise on how to add the all the new task under and existing Google Task List just like you have for Zoho CRM.