That sucks, sorry.

I wanted to purchase that same bundle, but I didn't want the hassle of getting DRM books into my device ecosystem, so I skipped it, since I noticed it was through Kobo.

For what it's worth, I've had great luck with purchasing other (explicitly DRM Free) Humble Bundles (i.e. Tor books).

But I can understand wanting one reliable place to shop. It's a shame that the one reliable place to shop for widely compatible eBooks seems to be the high seas, at the moment. Yo ho!