Sorry for the confusion. You do not need CSS for this because the solution is in the settings.
1) The previous issue with the text is because UberMenu does not display the image and text well when the layout is set to automatic. The layout should be set to Image above.
2) The last post was displayed to the right because the item with two lines of text prevents it from moving to the left. The solution to this would be to select a column layout appropriate for your number of items. In this case, 1/5 because you have 5 items.
Please consider using the options because custom CSS, though a quick and easy solution, might cause issues down the road. Moreover, the use of available options is part of product support. Custom CSS on the other hand serves only as a guide and issues arising from the use of custom code and further enhancement of it are outside the scope of our support.