Pocket silliness: why aren't all my articles local?

Many's the time I've been on the bus and have tried to read a Pocket article on my Glo, only to have it time out trying to connect to the Internet and download it.

This strikes me as silly. Isn't the whole point of Pocket that you don't have to be online to read something?

Does anyone know of a way I can force my Glo to download all my undownloaded Pocket articles when I sync? I have looked at the Pocket settings both on my Glo and in my account online.

Thanks!