Nothing strange to this as they got all GOTOFMS as callsign. Probably a standard setting
Please find below a list of recent MODE-S reports of E-6's
AE041A 164408 GOTO FMS 2009-02-04 11:51:15.546 E-6B United States VQ-3 Valletta, MT
AE041A 164408 --- 2009-02-04 11:50:49.328 E-6B United States VQ-3 Valletta, MT
AE041A 164408 --- 2009-02-04 11:17:38.646 E-6B United States VQ-3 Italy, R, IT
AE041A 164408 GOTO FMS 2009-02-04 09:00:55.259 E-6B United States VQ-3 Faro, PT
AE041A 164408 --- 2009-02-04 08:59:43.478 E-6B United States VQ-3 Faro, PT
AE0418 164406 GOTO FMS 2009-02-03 21:31:12.895 E-6B United States VQ-3 Baltimore MD (TEST), US
AE0418 164406 --- 2009-02-03 21:30:23.535 E-6B United States VQ-3 Baltimore MD (TEST), US
AE0418 164406 GOTO FMS 2009-02-03 18:04:01.353 E-6B United States VQ-3 Philadelphia, PA, US
AE0418 164406 GOTO FMS 2009-02-03 18:01:22.801 E-6B United States VQ-3 Baltimore MD (TEST), US
AE0418 164406 --- 2009-02-03 17:57:22.801 E-6B United States VQ-3 Baltimore MD (TEST), US
AE0418 164406 --- 2009-02-03 17:55:50.400 E-6B United States VQ-3 Philadelphia, PA, US
AE0418 164406 GOTO FMS 2009-02-03 14:17:26.940 E-6B United States VQ-3 Philadelphia, PA, US
AE0418 164406 --- 2009-02-03 14:16:31.992 E-6B United States VQ-3 Philadelphia, PA, US
AE0418 164406 GOTO FMS 2009-02-03 14:04:56.001 E-6B United States VQ-3 Baltimore MD (TEST), US
AE0418 164406 --- 2009-02-03 14:04:50.392 E-6B United States VQ-3 Baltimore MD (TEST), US
AE0411 163919 GOTO FMS 2009-02-03 06:33:13.232 E-6B United States VQ4 Kent WA, US
AE0411 163919 --- 2009-02-03 06:32:36.576 E-6B United States VQ4 Kent WA, US
AE041A 164408 GOTO FMS 2009-02-02 23:27:14.599 E-6B United States VQ-3 Faro, PT
AE041A 164408 --- 2009-02-02 23:24:26.740 E-6B United States VQ-3 Faro, PT
AE0411 163919 --- 2009-02-02 12:24:02.933 E-6B United States VQ4 Oakland CA, US
AE0417 164405 GOTO FMS 2009-02-02 10:38:50.956 E-6B United States VQ-3 San Francisco CA, US
AE0417 164405 --- 2009-02-02 10:37:57.020 E-6B United States VQ-3 San Francisco CA, US
AE0417 164405 GOTO FMS 2009-02-02 10:28:50.514 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 --- 2009-02-02 10:28:46.566 E-6B United States VQ-3 Oakland CA, US
AE0411 163919 GOTO FMS 2009-02-02 10:09:30.967 E-6B United States VQ4 Las Vegas, NV, US
AE0411 163919 --- 2009-02-02 10:08:44.045 E-6B United States VQ4 Las Vegas, NV, US
AE0417 164405 GOTO FMS 2009-02-02 08:46:31.629 E-6B United States VQ-3 Ladysmith,Vancouver Island, CA
AE0417 164405 --- 2009-02-02 08:45:52.348 E-6B United States VQ-3 Ladysmith,Vancouver Island, CA
AE0417 164405 GOTO FMS 2009-02-02 08:27:28.624 E-6B United States VQ-3 Kent WA, US
AE0417 164405 --- 2009-02-02 08:26:31.609 E-6B United States VQ-3 Kent WA, US
AE0415 164388 GOTO FMS 2009-02-01 22:12:11.866 E-6B United States VQ4 Mt Olivet KY, US
AE0415 164388 --- 2009-02-01 22:01:10.434 E-6B United States VQ4 Mt Olivet KY, US
AE0415 164388 GOTO FMS 2009-02-01 21:14:31.090 E-6B United States VQ4 Baltimore MD (TEST), US
AE0415 164388 --- 2009-02-01 21:13:49.231 E-6B United States VQ4 Baltimore MD (TEST), US
AE0417 164405 GOTO FMS 2009-01-31 21:52:04.499 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 --- 2009-01-31 21:42:42.739 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 GOTO FMS 2009-01-31 21:25:20.253 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 --- 2009-01-31 21:24:52.125 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 GOTO FMS 2009-01-31 20:59:57.658 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 --- 2009-01-31 20:59:34.320 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 GOTO FMS 2009-01-31 20:39:45.368 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 --- 2009-01-31 20:34:38.902 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 GOTO FMS 2009-01-31 20:02:01.881 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 --- 2009-01-31 20:00:58.953 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 --- 2009-01-31 19:55:05.751 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 GOTO FMS 2009-01-31 19:31:38.367 E-6B United States VQ-3 San Francisco CA, US
AE0417 164405 --- 2009-01-31 19:31:27.000 E-6B United States VQ-3 San Francisco CA, US
AE0417 164405 GOTO FMS 2009-01-31 19:09:06.395 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 --- 2009-01-31 19:09:00.378 E-6B United States VQ-3 Oakland CA, US
AE0417 164405 GOTO FMS 2009-01-31 16:20:47.988 E-6B United States VQ-3 Kent WA, US