Past Due - Will be Installed

I have some applications that show failed in the MSI logs but they are listed as Past Due - Will be installed.  I have 2 questions.  Does anyone know why they would show Past Due and not Failed when they actually failed to install.  I know alot of times we might have failures but in Software Center, they actually are listed as failed and not Past due.  Also, will the software ever try to install again or when they are in this state, they will need manually kicked off (I assume manually kicked off from what I have read)?  Any help is appreciated.