All of the Hadena episodes are uncensored and from the same video source, AT-X.  I just checked and found the AT-X station watermark on eps 2 and 3 as well as 1, 4, 5 and 6.  The file name irregularity is probably because they reported having a lot of staff out sick or away for a couple of weeks back then.

Of the other two groups offering this show, SubDesu is also using the uncensored AT-X version, even though they don't say anything in their file names, but they have been complaining about the video quality of what they've been able access most weeks (already compressed with data loss, according to someone else's preferences.)

Lastly, Commie has started offering the censored version broadcast by Tokyo-MX, probably because they already had a source for this station.

As a general rule, if you find the AT-X station watermark in a show (typically shown soon after the opening credits), it is uncensored or it is the most uncensored version of that show available by broadcast.  Sometimes the only completely uncensored version of a show is the blue-ray disc version which comes out later.  (Some shows fake censor themselves to boost BD sales.)  By the way, censorship in Japanese anime has always meant masking something, not cutting out scenes.  So you don't miss out on a thing, plot-wise.  Personally, I like to have a censored and uncensored version of shows I like.