Autocomplete still fcked up

Whenever I try to create an anonymous javascript object formatted like this:

{

    field:

And hit the tab key to line up my values, Sublime gets totally screwy and starts changing what I typed for "field". It just keeps attempting to autocomplete "field" into "fieldkey" for some reason. There's no auto-complete popup though, this just happens all on its own with no way to cancel it. Anyway it's totally messed up and I can't type what I want to type. Even typing shift-tab doesn't work--there's some really weird behavior there too, type shift-tab and then tab and the cursor jumps all over the place, inserting characters and stuff.