I recently contacted Garmin regarding what I perceive to be errors in maneuvers required to follow the route provided by my C550. The errors occur when approaching a fork in the road - one branch of which continues straight, while the other required you to bear left. In this case, two roads merge into one for a brief period of time, and then diverge.

Specifically, a County road remains straight though the area in question, while a State Highway intersects from the right at a signalized intersection, and then diverges to the left at the next signalized intersection.

While approaching the first signalized intersection on the State Highway, the geometry of the intersection requires you to turn right to continue on the State Highway. As you approach the second signalized intersection, the geometry requires that you bear left to remain on the State Highway. My C550 gives no indication that either of these maneuvers is required.

Similarly, when approaching the second signalized intersection, my C550 advises me to "bear right" to remain on the County road (obviously traveling a different route than in the first example).

Garmin's explanation for this is that the State Highway is a "higher classified" street, resulting in no maneuvers being indicated.

My question is: Is this typical of Garmin and/or other standalone units?

The reason I ask is that I have been using several navigation applications on my phone over the past 18 months, and this is the first I have encountered this problem at these intersections. In fact, every mapping site I could find, including Google Maps, Yahoo Maps, MapsOnUs, MapQuest, and Rand McNally all show the maneuvers I would expect.

I'm disappointed so far, and feel like I have to keep checking the map display to see what I should be doing.