Hello,
The order log history indicate that the credit card form that you have at the end of the checkout, has been validated twice by the customer.
I can see to add some javascript in order to avoid the double-submission ; that we wait for the return of the Stripe token serialization result before allowing a new submission (in case the returned failed and the customer need to change its card details).
In the mean time we are working on a big modification of the plugin which will integrate the Stripe card form directly in the HikaShop payment step of the checkout.
But, since you are using HikaShop 3.2.0 ; I don't think that the new interface will work (since it requires patches added into HikaShop 4.0.1 and 4.0.2).
The plugin will still propose the credit card form at the end of the checkout via its options but the new mode would be for sure avoid the double submission since the payment can be made only once, when the order is being created.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.