xPropaganda did not ship with a slipcase, so you are definitely confused!
Let's clear this up once and for all... The only blu-rays that *didn't* ship with a slipcase are Tears For Fears and xPropaganda and that's because I didn't think of the idea until we came to Gilbert!
We added the TFF slipcase to every Shakespears Sister order since that was a very easy way to get those to people and 95% of people who had ordered Shakespears Sister had already ordered TFF.
With xPropaganda there was a lengthy delay in getting these designed, for various reasons. However they were done by the brilliant Philip Marshall (who did all the design for the products) and had to be approved by Paul Morley and the band etc. These arrived this week in time for me to offer a bundle option with Orbital.
Both TFF and xProp can be ordered on their own and are free but you do need to pay for postage (which I don't think is unreasonable!). However in most instances there should be no extra postage costs if you add to another order (like a blu-ray).
Going forward there will be no more bundles with slipcases. If you want either TFF or xProp you can just order them.