Navigational (global Positioning System) Gps problems of the 2006 Lexus IS350

In navigation add 5 destinations to your trip list. 2. While driving ( not in park ) press "route", then delete. 3. Display should have the first destination highlighted in white on the bottom , for example "destination # 1" is yonkers Ave. The other 4 above it are grayed out ( meaning they can not be selected. ) 4. You press the 1st destination, you are asked to confirm the deletion. "yonkers Ave" 5. You say yes. The screen refreshes ? calculating route? appears above the question : ?confirm the deletion. "yonkers Ave 6. You are asked again, the exact same question, confirm deletion - listing the "yonkers Ave once more. You respond yes, again, ( do not hesitate to press the yes button , you have only 5 seconds or so ) 7 the screen refreshes 8. You are asked again, the exact same question, 9. Confirm deletion - listing the "yonkers Ave once more. By answering yes, more than once to the repeated question, do you want to delete the first destination you are in fact deleting the remaining 2nd, 3rd, 4th, and 5th, destinations -. I went for a test drive with salesman jeff and documented this and again the next day with angel. We drove a demo vehicle ? not my car ? and the problem was identical. Please advise if I am eligible to have this serviced under warranty. Map dvd data ver = 05. 1.