Gantt Chart Logic

While completing a Gantt Chart development with calendar logic between tasks I find that Wrike adds "Start Constraints" if certain data is edited within the schedule. The most glaring and easiest to explain is as follows. 

• input a task Name.
• Determine and input its predecessor notation relative to another task. 
• At this point the duration is automatically entered as 1d and the Start and Due dates are automatically entered. 
• Change the Duration. Wrike adds a Start constraint that will force the start date to equal the start constraint. 
• Try to delete the start constraint to again let the logic drive the schedule. Removing the start constraint does not update the task start and due dates to follow logic. 
• It seems the only way to get the task to now follow logic is to delete the start  date, due date, and the predecessor then re-enter the logic (with the duration that was entered a few steps ago) and let Wrike recalculate the start and due date. This time the dates will be driven by the schedule logic. 

This can be very frustrating and a time waste during the development of a schedule. Worse if the start constraint is not noticed the user may think the schedule is driven by logic when it is not. Further, if during a project progress the schedule is visited and adjusted for reality by editing a duration of a task the start restraint again is made. 

Does any one else struggle with the Wrike start constraint or the Gantt Chart system in general?  

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