File preview/names not working!

Does it take long before activity is populated? After a large inital import viewing any file just shows a white screen. And here is a copy of my activity screen after the import..

clearly these are note the correct file names.

#
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
# Island
 
sad I’m sad
Inappropriate?
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