I read the FAQ and instructions but still its a crap shoot. i post on my wordpress site blog add a picture and hit repost in Facebook. it auto posts but….

sometimes the picture image i added on the blog appears in FB and most times it doesn’t. different images.
i looked at the differences of why one pix on one blog post will be added and other will not and everything is the same. so i can’t figure it out.

i have set it so facebook autofills the info. i tried the og meta tags but that didn’t seem to work. it would be ideal not to have to do the tag extra step but seems this is were the issue may lie.

any other ideas or tips?