We have been using httrack to copy a site from the internet to a local drive on
the server. we only noticed recently that some of the folder names are
truncated (Ex: "Impo" instead of "Important") and in some cases the file names
has some random extensions like .delaye, .c, and in some cases it shows some
random numbers are extensions. we are not sure what is happening with copying
these folders or files. Could you please help with this issue? 
Please let me know if you need any further details.