I have tried your plugin and quite like it. However, after activating it, blog posts are shown in a different order (looks like the oldest appears first, but not always). I am using WordPress 4.5.2, and this happens even after deactivating all plugins except this one. Are there any compatibility issues with WP 4.5.2?
I have had a deeper look at it and it seems related to using the action clientarea_default_order. I have commented out line 30 from classes/class-hooks.php and it seems to work, but I am not sure if it can affect other parts of the plugin… Is there a better solution?