You are trying to change the wrong thing. You need to change the coordinates that you have entered into the software so that when it sends the data it sends the correct coordinates this is totally different from what you told findu your coordinates were.
This data stream is wrong you must change it what ever software you are using
DW2887>APRS,TCPXX*,qAX,CWOP-4:!3700.00S/07700.00E_112/000g000t078r000P000p001h64b10109.VWS-RainwiseMKIII
DW2887>APRS,TCPXX*,qAX,CWOP-4:!3700.00S/07700.00E_112/000g000t078r000P000p001h64b10109.VWS-RainwiseMKIII
DW2887>APRS,TCPXX*,qAX,CWOP-4:!3700.00S/07700.00E_180/000g000t078r000P000p001h62b10109.VWS-RainwiseMKIII
DW2887>APRS,TCPXX*,qAX,CWOP-4:!3700.00S/07700.00E_180/000g000t078r000P000p001h64b10109.VWS-RainwiseMKIII
DW2887>APRS,TCPXX*,qAX,CWOP-3:!3700.00S/07700.00E_225/000g000t079r000P000p001h63b10109.VWS-RainwiseMKIII
DW2887>APRS,TCPXX*,qAX,CWOP-3:!3700.00S/07700.00E_112/000g000t079r000P000p001h63b10109.VWS-RainwiseMKIII
DW2887>APRS,TCPXX*,qAX,CWOP-3:!3700.00S/07700.00E_112/000g000t079r000P000p001h65b10109.VWS-RainwiseMKIII
DW2887>APRS,TCPXX*,qAX,CWOP-3:!3700.00S/07700.00E_112/000g000t079r000P000p001h64b10109.VWS-RainwiseMKIII
DW2887>APRS,TCPXX*,qAX,CWOP-7:!3700.00S/07700.00E_112/000g000t079r000P000p001h62b10109.VWS-RainwiseMKIII
DW2887>APRS,TCPXX*,qAX,CWOP-7:!3700.00S/07700.00E_112/000g000t079r000P000p001h64b10109.VWS-RainwiseMKIII