MarketPress v3 errors with adding other items to cart


I'm testing MarketPress v3. When I view a standard product page and press Add to Cart, the item is added to the cart correctly.

If there are other Add to Cart buttons on the page, I get problems:

- If I click Add to Cart on a related product, the main product gets added to the cart, not the related one
- If I add an extra Add to Cart button for a different product to the page (using [mp_buy_button product_id=1234] ). Clicking the button adds both this product and the main one to the cart.

What do you think?