Getting double letters when typing in tags

[horseman]

Whenever I add a tag to any program that excepts tages (Evernote, Leap), the first tag I type in (whether a new tag or an existing tag), it works fine: "shopping" comes out fine--either typing it in as a new tag or finding an existing one). But when I type the next tag, I get double letters: "sshhooppiinngg," which means it can't find an existing tag (even deleting the superflous letter doesn't help; it still won't find it--I assume because the extra keystrokes makes it assume I'm creating a new tag) and it's a pain creating a new one because I have to delete each superflous letter as I type. Anyone know what the heck is going on?

I'm using a mac pro with OS 10.6.6 (latest), Evernote 2.0.5 (latest) and Leap (2.5.4 (latest).