HookPad is very Buggy!

I can not add second note to melody? When I go to do this, the note that is already in that measure is replaced?

I tried copying a set of notes that I wanted to add as harmony notes and same thing happened. It seems I can only have a single note melody!

Several times I have had to close and reopen HTP to work?

You have to put the other notes for the melody in another voice (it is a pane on the right that comes up when you are entering melody) You are limited to 4 voices.