You have different layout schemes applied to the pages which is making them inconsistent.
Your home page has a layout called SpringtasksLayout with these dimensions: 586, 748.
Your Planting Ideas page, for the sake of example, has a differnt layout called HomeLayout applied to it, which has these dimensions: 591, 735.
Your Master Border settings are the same, so on first glance I'd say you need to apply the same layout to each page rather than use a different layout for alternate pages.
Either use the SpringtasksLayout or the HomeLayout and this will apply the same dimesions and position to your left border and link bar.