Greetings.
From your description and my doing a test run on the whatsmygps.com website, are you sure that your QTH's exact location is what they came up with? I typed in my address (including the street name and house number), and got a different segment of the street in my village, rather than the exact location of my house, as if they ignored the street name and house number of my address, or got confused because the street name is used in several discontiguous places. Their satellite map image actually showed the location of the middle school over a kilometer from my house.
Another possibility is that you're using the wrong units to enter your latitude and longitude. APRS uses a standardized format called DDMM.MM (or degrees and fractional minutes). It specifically does _not_ use degrees/minutes/seconds (typical GPS device display format) or fractional degrees (such as whatsmygps.com reports). Although you can change preferences in YAAC to display and enter coordinates in those formats/units, they will be translated to DDMM.MM format before transmission in APRS packets.
My suggestion for easy data entry is to download the OpenStreetMap data for the region around your QTH, pan and zoom in enough so you can precisely see the street location of your station (relative to nearby intersections, curves in the road, etc.), then right-click on the map where your home is, and pick the "Move Home Here" popup menu choice. Once you confirm the change, YAAC will copy the coordinates of where you right-clicked as the new fixed location of your station. If you have an actual GPS receiver, you can confirm that the same coordinates were returned.
Another thing to confirm is if the OpenStreetMap data is actually correct for your area. Since it is entered by crowd-sourcing, it is entirely possible that the person doing the data entry made an error, or used incorrect source data. You might need to get a GPS receiver and an OpenStreetMap account and correct your local data, in which case I would pick up the changes a week or so later when I download another snapshot of the world-wide OpenStreetMap dataset and reprocess it into YAAC format.
I did enter your address as provided on QRZ.com into both maps.google.com and and got similar-looking maps, but I have no way to confirm that either are correct or accurately placed (or that I didn't get the wrong town with the same name elsewhere in your country).
Hope this helps.
Andrew, KA2DDO
author of YAAC
