Missing bundle property on entity

This modules doesn't extract the entity ids correctly.
The bundle name is missing at some point.
There is a check in the common.inc in 'function entity_extract_ids' that throws an error because this bundle type is not defined.

The module for fixed coupons works fine and throws no error.
Any ideas why this is happening?
I notice that the coupon is applied to each line item and not the order total.
Could this be an issue?

Or is this a problem with just my setup.
I haven't seen other post with this problem :(

Any help will be appreciated.
Thanks in advance for your time.

peace,
michael