Bug with grouped pricing?

Are the products you are adding to the group membership products? PMPro WooCommerce has code to make sure only one membership product is in the shopping cart at once. As far as I know a grouped product just adds the products you choose to add to it into the cart as separate products so you can’t group up multiple membership products.

Here is the code where we restrict adding more than one membership product at a time: https://github.com/strangerstudios/pmpro-woocommerce/blob/master/pmpro-woocommerce.php#L67-L96

You can disable this with this gist: https://gist.github.com/ideadude/9aaccf5cb4433004d0147633c47e8d35