Thanks for the response. Yeah, I supposed it has something to do with the rss feed source. I have about 30 different sources and some of them are fine, it’s just a few of them with this problem. I noticed that the larger image got cropped to a size I defined for the featured image, but smaller images do not get stretched.
These are some of the feeds that are giving me smaller image size.
http://www.thithtoolwin.com/feeds/posts/default
http://www.myanmarcelebrity.com/feeds/posts/default
I’m having the same issue too. I’m auto-posting to facebook and the ad code is included in the excerpt posted, even if I set the ads to only display at the end of the post.