Just wondering, has anyone else cancelled a pre-order for store credit and had the following issue?

A $190 pre-order was cancelled by me and I received store credit in the form of a voucher code. Also had 190 energon points removed from my balance. I've then placed a new order which totalled $269.90 and used the $190 store credit coupon as part payment for this.

Now the problem is that the system only thinks I've paid the difference, i.e. $79.90 which brings about two issues:

1. The paid amount brings the order below the free shipping threshold, hence a new $9.95 shipping charge was applied.
2. I've only earned 90 energon points from the process rather than 270.

Have shot an e-mail to cservice to see if there's a workaround.