By the way, using this post to ask another question.
Please, don't mix two different subjects in one topic. It makes it much more difficult for others to find an answer if they have the same question. And for admins it's 'kinda hell' to split one post in two pieces, make a new topic, copy/edit/move your post, etc. etc.
Next time
shouldn't the subtitle be saved with the same name as the movie file?
Yes and no
Many video players have least difficulty with using subtitles if the video file and the subtitle file have the same name. And this is probably what the uploader has done.
But many subs are not only matching that specific video file, but also other releases. Have a look at for example
http://www.opensubtitles.org/en/subtitl ... yriding-nl . This subtitle is uploaded as a "LOL" subtitle (see the matching subtitle file name and release name), but it can be used for DIMENSION and AFG (and probably some more) as well.
By now, this subtitle has some additional hashcodes (not only for LOL, but also DIMENSION and AFG), so when your software searches for matching subtitles for your AFG video, it finds this LOL subtitle. And the same for AFG subs found when searching for DIMENSION, etc. etc.