Motion blur/ghosting tv issue

Back in the summer my wife and I bought a new tv when we moved. It's a 55 inch RCA LED TV. I feel like recently, I've been noticing a TON of motion blur/ghosting that I never really noticed before. Is that even possible? Am I losing my mind?

I did few tests as well. For example, if I'm watching ESPN or a game of hockey it looks good and clear - no issues. I noticed that if I put on AMC to watch the Walking Dead, it's awful. The motion blur is pretty bad on certain channels. I also have my PS4 hooked up to this tv, and can honestly say I've never really noticed any major issues.

The tv it self doesn't appear to have anything within the settings to combat this, it does have a "MFC Setting" as well as a "Video/Graphic" setting within the picture settings, but that's it. I also messed around with the settings and switched the tv from 1080i to 720p. Still not much help though.

Anyway, can anyone offer advice or if it's just something to deal with since it's an LED tv, etc.? I feel like this wasn't noticeable in the past, but has gotten worse...which has me worried since the tv is only like 4 months old.

My last thought was maybe the HDMI cable was faulty that runs from the DIRECTV box to the TV...but I didn't think that would make a difference.

Thanks in advance guys!

I can't watch any LCD/LED for this exact reason.  What you are seeing is the cooldown of the pixels from scene to scene.  It's a vision "defect" that apparently happens to a small portion of the population with LCD/LED.  I'm boned if any of my Plasma TV's decide to kick the bucket.  I do notice the ghosting less with a higher refresh rate (240MHz) LED's.