I need to sign everything twice!

I have what I guess is a minor - but very annoying and bizarre issue.

I quite frequently have to electronically "sign" pdf documents.  I have my signature stored, so I click on it then go to the signature location and enter my signature.  But I have to do this TWICE every single time!  The first time I drop it, the signature disappears.  Then I go back and do the whole process again and it works.  Granted it's just a few seconds, but it's more than a little aggravating when you have a dozen of these things lined up and have to go through signing them twice every time.