In order to ‘track’ with more accuracy a MIDI guitar controller puts out
mucho extra MIDI info. (mainly lots o’ extra pitchbend/note info)
Back in da day in order to use MIDI tracks in a ‘live’ situation,
projects were stored on floppy discs. (Roland MC50)
So to save space this ‘extra’ info needed to be removed.
(Now days this is not a prob).
One of the Cubase LE presets was ‘delete short notes’ (its still there).
Once I learned how to adjust the value/length of the short notes,
I started to get a ‘feel’ for how the LE works.
Now along with KC’s I use it for many purposes.
Like for example: quickly adjusting MIDI volume/pan/octaves etc.
And some ‘secret sauce’ stuff as well. 
{‘-’}