Warranty showing different from Invoice date.

Dear Dell,

I have bought a Dell laptop from a Carrefour Abu Dhabi U.A.E on 29/07/2017. When I checked with dell using the service tag, its warranty start date is showing about two months before the invoice date. Also accident damage protection warranty started from the date it was shipped to U.A.E which was around 15 May 2017 and My warranty end in 15 May 2018. What does this mean? I have registered the product and don't know whether it will get changed to the purchase date. I have proper tax paid invoice with me. Please help me to correct the warranty period as per my purchase date. I will have attached invoice and service tag with this mail Please rectify my problem immediately 

Service Tag

invoice 

Regards

PRANAV PRATHAPAN

30 May 2018