Just for another test...I uploaded 5 php file...in ASCII format: 
 
Here are the various permissions assigned once the upload was complete: 
 
rw- -w- --- 
rw- r-- r-- 
rw- --- -w- 
-w- --- rw- 
rw- -w- --- 
 
As you see here, these should all be (644) or at least the same permissions.
		 
		
		
		
		
		
		
		
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