Moving of tasks

When moving tasks from week to week or from parking lot or other categories the task duplicates said task. As a premium user this tends to duplicate and clutter my google calendar. I would like to use the lower categories and the day categories as "units". Meaning dragging one from one area removes it and places it in another. Then tasks that have time tables that move or are variable are not showing up in several weeks and areas. Also erasing one from a daily removes it from the lower categories. This makes it hard to move a task from Saturday to Sunday the next week. I like the drag and drop feature but can only use it on the page your in so if you move it from Sunday to Saturday you have to "park" it in another category and then open the next week and re-drag. I know you can edit each task but then you lose the convenience and speed of the dragging action. Otherwise I find this app to be a huge benefit to me I can plan my day in minutes every morning from my handwritten notes and meeting agendas. It is just when they move projects over and I have to adjust 6 or 7 things from a week to week basis I find myself looking for other options to expedite this process.

Thank you