Hi,

What would be the best way to keep products from different categories from being cumulatively added weight-wise for shipping?

I'm using the AusPOST modules.

I have a Comic Books category, and a Posters category. If someone's ordering multiples from a single category it's ok for their weights to add up.

The two categories use different incompatible shipping containers however, so someone ordering 1 book and 1 poster should pay 2x the minimum parcel postage.

Currently the system is treating them as a single shipping order and only billing one lot of postage.

How do I force different product categories to ship separately, or at least maintain separate shipping rates / prevent mixed category orders.

Thanks,
Matt.