You're assuming that when they say her phone pinged near Gooding that it means her phone pinged in Gooding. I don't think we know the exact location of the cell phone tower, and from there y0u'd have to draw a circle around it to determine the area within which the phone could be located. They might mean near the Gooding exit. (shrug)
There is so much that we aren't being told, such as whether the phone pinged between Woodland Park and Gooding, the contents of the text messages, her electronic history: phone calls, text messages, browsing history, social media, google search history, and on and on. I'm sure that LE has much more information than we will every know.