Here's their response to my email:
Thank you for contacting Garmin Product Support.
I am happy to help you with this.
I recommend , verifying the map-setup is set to "lock on road". I also
suggest we auto -locate the device. From the satellite page, press the
menu
button , select new location and automatic. The unit then needs to be
outside in open sky view 20 min un-interrupted.
Beyond that it depends on acquisition ? It matters if you are
matching
someone's predetermined lat/long , is it set the same as their position
format?
It may then prove best to call support if it is still a problem.
If you have any additional comments or questions, please do not
hesitate to
contact us via email or at the number listed below.
Please include all previous e-mail correspondence.
Sincerely,
xxxxxxxxx
Product Support Specialist
Garmin International
1200 E 151st St.
Olathe, KS 66062
Ph: 1-800-800-1020
Fax: 1-913-440-5488
www.Garmin.com