I actually looked into it a bit more. This may have been the fault of the default "workbench.editor.enablePreviewFromQuickOpen": true, as quick open is literally the only file opening mechanism I use (I assume, if that's cmd+p). Weird default. I turned it to false, maybe that will fix the closing-files issue.

Now if only I can get it to stop automatically closing quotes during comments and ruining my english contractions:

// it' => // it''

Any way around that? :(

This sounds like a bug or bad setting. I'm able to type contractions in comments in Sublime without it auto inserting a closing quote. Perhaps try reverting to default settings for a moment.

"editor.autoClosingBrackets": false

Unfortunately, that also turns off all bracket matching.

Yeah, I saw that, that's no good. I like it 98% of the time :)