Why Must Documents to be Signed be Downloaded First?

Good Morning,

When I send a document to my supervisor to be signed in Adobe Sign she has to download the document, save it, then she can sign it.  I have watched many videos online regarding the basics of Adobe Sign and this is not how it is supposed to work.  Can anyone tell me what I am doing wrong?  This happens whether it is a word doc or a pdf - we do not use any privacy fields where you have use a password.  These are usually just one page regular letters to be signed by one person.  By watching the videos it seems very easy to use, I must be doing something wrong.

Thank you for any help you can give me!