There are a number of problems with this view, and we're unable to reproduce them. Please could you attach a copy of your file - feel free to delete or scramble all fields not used in this view. Alternatively, email it to support@visokio.com.
Please confirm you mean the sideways text starting "Change in Twitter" at the far left in your screenshot.
I'm not seeing this text in the file you sent in either 2.8 or 2.7. Is it possible you have an old version? Also try consulting "Scale > Label axes with measure names".
Please check you've got the latest version installed, then open the same file you emailed and check again. Perhaps you sent a file that didn't exhibit the problem.