save pdf

I'm working on my iMac with acrobat pro. Lately when I open or download  document (eg, bank statement, credit ccard statement) and save it to my Mac, it saves te docuent on the workspace instead of just the doc. This happens even if the doc is showing on my screen as just the doc, not on the acrobat workspace. I only want the doc. 

Thanks for your help. This is really frustrating.