VAT on all recurring payments

Hi. I'm using OC 3.0.2.0 with PayPal Express and the 'OpenCart Express Product Subscriptions' extension.

I have a recurring profile setup for 12 monthly payments. When a recurring order is placed, the VAT is added to the first payment - but is NOT being added to all subsequent payments. PayPal Express sets up a recurring profile, but the monthly amount is the net amount with no VAT.

Does anyone know what I'm doing wrong here?

Thanks.