Attachment Problem - different file name, same attachment

[Disco Stu]

We are having a weird problem with Outlook attachments whereby if you copy
and paste attachments from one email into another (e.g. copy attachments 1
and 2 from message A in my Inbox, attachment 3 from message B in my Sent
folder into new draft message C) the attachments appear to be different and
unique (file names are preserved) but the attachment content (and size) is
the same?

 

[dlw]

If the file names are preserved, and the content and size is the same, how
exactly are they different?

 

[Disco Stu]

Let me clarify - the 3 files that are copied from other emails are different,
when pasted into a new message, they appear to be different, preserving the
original file name, when you look at the sent item, it appears you sent out 3
different files but when you open the attachments you realize the contents of
each file is identical (even though the file names are different).