By using the Subscription API to create a subscription, I have created one with a proper return URL and cancel URL. Upon my customer agreeing to subscribe to my Plan, Paypal auto redirects my customer back to my website via the return URL without having to click on any thing. But the problem is that the return URL is invoked twice and runs as 2 separate processes in my application and therefore, data is clashing with one another. No matter how much I have checked, I have followed every single step from here and it still invokes my return URL twice. Please do help me out as I am stuck here for weeks already and I do not have the solution. Attached below is my parameters passed to the subscription API containing the return URL and cancel URL (which both are running fine, just calling twice for return URL).
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