GST Calculation Issue with sales order

I am trying to setup ERPNext(v13) for a business having products with different GST rates , I setup ITEM Tax Template for each items and expect the sales order will apply the tax template for each item based on it’s template . For same state sales order I expect the system should apply only output IGST and output CGST but it applies all the possible categories under the GST and add it to the billable amount . I am attaching few screenshots for your reference . Am I doing anything wrong with the tax templates , Please help me

Try unselecting the highlighted checkbox in the screenshot and see if it solves your problem

Check out this video for detailed steps for GST Setup