Uploading exercise issues

Hi All, I wonder if anyone have ever encountered issues as below: a. Upon having Exercise uploaded to Liveworksheets, but the exercise has dark background, the question lines are all deem and too small. No one could read it. b. We upload a 11- page pdf file to make exercise sheet, however, during editing Liveworksheets only displays the first 9 pages. The last 2 pages are lost. Could you pls advise your insight and how to fix such issues. Thank a ton. Regards, Kieu