Pro Sites, Free Trail and Stripe

I have a wpmu installation with Pro Sites and I'm using Stripe as payment.
I would like to offer only one premium plan with free trial. I activated also "Pay to Blog" module, so the account will be deactivated after trial period.

After creation of new site I'm getting message "You have 14 days left in your Pro free trial. Checkout now to prevent losing Pro features »".

Here is working everything correct as I set it to 14 days, but after checking out I'm still getting this message and the payment date is set to the day after trail period.

Is it designed to work like that? I think it can be very confusing for the user. After successful payment his trial mode should end up and the payment should be processed immediately.