the title of no EP contains [EP], it's just correct to put the format of the release after the title if it's not an officially released LP.
[EP] for an EP
[CDS] for a conventional (CD) single
[7"] for a vinyl single
[OST] for an original soundtrack
[Remix] for a remix album
[Demo] for demo recordings
[DVD] for DVD rips
[LBL] is what i personally use for live bootlegs
it's used to distinguish releases, say the 'Arcade Fire' demo from the 'Arcade Fire' EP.
Actual title according to my case and musicbrainz is "Arcade Fire" not "Arcade Fire [EP]" or "Arcade Fire EP" etc.
There is know correction link on page though. Why due some entries have correction vote links and others don't?