Fences and Walls: What Happens if You Discover That a Fence Line is Not Actually the Property Line

My question involves real estate located in the State of: Arizona

Hi folks,

First time here, and it's probably a good start.

The history: I just bought a house in Arizona described as 1.2 Acres. I've lived there for 4 months.

It was on a whim really when I went to the Maricopa County Parcel map to look at the house. It was there I realized that the actual boundary wasn't where my fence to the neighbors parcel was located.
It's a rhombus-type shaped parcel, and the boundary online is the same direction as my fence, only 17 yards apart. I was blown away.. for whatever reason, the physical fence between our parcels was 17 yards off, in my deficit. So to double check, there's a google-app site that calculates square footage. My fenced in area is only 1 acre, exact. I'm .2 short. Their property on the online map doesn't list the "contested" property as well. Apparently there's just a very large fence splitting the two parcels, and it's 17 yards off.

It's not 3 feet, or 5 or ten. (I wouldn't pursue a course of action for that). 17 yards? That's pretty substantial. From 2011 photos in google earth I can tell the fence has been there at least that long.

Is the title company liable for this mistake? I was supposed to have bought 1.2 acres..

Thanks in advance..

Fences and Walls: What Happens if You Discover That a Fence Line is Not Actually the Property Line