Folders and files are overlapped by menu in Finder
It's most likely a Problem with automatic sorting and cleanup in the Grid Display. Look at the general Info Pages from Apple Support here and here about customizing your Display Settings. 

In Short: Right-click (if it is activated) on the Finder Window and change the 'sort by' Option and activate the cleanup. You probably have the Option 'Snap to Grid' activated - try deactivating it.

-- Addendum --

As a second option, try deleting the '.DS_Store'-Files, which store Icon Positions and Images (see further explanation here). If that doesn't help there are a few other possibilities, but let's start with the easiest one

Like all Files starting with a dot [.] these are invisible. You have to use the Terminal.app, found in /Applications/Utilities/ do remove them. Technically, you need only remove the .DS_Store-File in the Folder "Canada" according to your Screenshot.

Open the Terminal and navigate to the Folder, f.e. within 'Documents'

cd /Users/yourusername/Documents/Canada


hit enter, the type 

rm .DS_Store


You should close the Folder "Canada" and then reopen it again. The Icon and Sidebar Position should be normal.