Maybe I'm dumb, but when I type in "Maro" it complains that the list of cards is too long. But I've entered the full title! And "Maro" still doesn't appear. If I just hit enter it defaults to the wrong card.

This is a known bug, we'll try to fix it soon :).

In the mean time, to add it, type Maro, then press escape to dismiss the autocompleted menu, and then enter (or the add button).

Thank you