the reason you have 'delays' in the song-editor is that you have expanded the note over the right egde of a terminal bar
The result is that the note ends after the next bar has strted, and that bar will then play back empty.
There are more than one way to solve that.
*) shoten the note so it will 'fit' inside the last bar
This will change the composistion, and meight not be wanted
*) Move the note-containers in song-editor so they overlap
This will solve the issue 100%, but it can be a little t&e with your mouse to move the containers precisely.
You move the containers snap-less by left-clicking the container and holding the mouse down move the mouse as you are holding it down. The container will now slide over the song-editor with no snapping
You can make any note have any length in piano-roll
Just rest your mouse over the right egde of the note, The cursor changes to a doube-arrow. Press left-mouse and drag or push, and the note will change its length
I recommend that you read the wiki in general and more specific
http://lmms.sourceforge.net/wiki/index. ... oll_Editor
for how to edit notes in piano-roll
Br.