With respect to the position the toddler was found, I think RYFQB solved the mystery in post #1359. When the body was found, it appears that
according to TASS the most recent search
area completed was 33
square kilometres. 33 kilometres is 20.51 miles, so the most likely explanation is the information was misreported as direct distance of 20 miles from the main crash site.
Given the 33 km^2 area, if we assume a circle, the body was actually found no more than 3.24 km away from the main crash site.