I swear, I've never had two orders combined succecssfully, even when I order within a few hours of each order, and the products are the same.

Anyone know what the reason is? I always select free shipping, so maybe that's it? Maybe different shipping locations?

I think they don't let you combine free shipping orders for some reason. Why, I can't really recall.

The free shipping is the thing that always killed the "combine orders" option.

I've combined single items into previously placed free shipping orders. Try adding one item at a time.

Change the orders you want to combine into standard shipping, combine them, and then change it back to super saver shipping. <--- This is what I had to do.

I have to choose either fast Internatonal shipping, or super fast International shipping and then change it back to standard.