We had the problem that all EUR-Payments will be interpreted as US$ at 2checkout. The answer of the support:
It looks like you are using the old connector for the legacy 2checkout platform. You should install the current extension which integrates with convert plus/inline/2payJS:
-https://github.com/2Checkout/VirtueMart-2Checkout
Please upgrade to the newest version and let us know if you still encounter any issues.
Kind regards,
Alex C.
Escalation Analyst, Merchant Support