I guess it's problem with theme. When I share something to Facebook, the first lines are going to be:
"caption id=attachment_396 align=alignnone width=480 caption=Kävijätietoa Ajatusjalostamosta viikkotasolla mitattuna. ][/caption]"
This is because, I have always a picture at first when I post something.
This is my blog. http://ajatusjalostamo.fi