Hi @Disha Patil and welcome to the Community!
It is very well possible that your subscription date has been aligned with an already active subscription, as your end dates in your subscription end on the same date. If that's the case, that should also reflect in your bill.
When still in doubt, for this type of questions reach out to Atlassian support directly to review your case via https://support.atlassian.com/contact/
Hope this helps!
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