Yeah, that was from me manually stopping it.
SGP parked the scope without stopping guiding around 1:20:46. From the PHD2 log http://adgsoftware.com/misc/PHD2_DebugLog_2014-12-31_200809.zip :
01:20:46.154 00.236 4288 Error thrown from scope_ascom.cpp:643->ASCOM Scope: pulseguide command failed: (ASCOM.GeminiTelescope.Telescope) Invalid while parked
Here are all the server commands in the log file in that time frame, no stop_capture was received:
$ grep evsrv PHD2_DebugLog_2014-12-31_200809.txt | tail -35
00:49:43.964 00.000 6984 evsrv: {"Event":"Settling","Timestamp":1420091383.964,"Host":"AGALASSO","Inst":1,"Distance":0.55,"Time":7.2,"SettleTime":8.0}
00:49:45.720 00.000 6984 evsrv: {"Event":"SettleDone","Timestamp":1420091385.720,"Host":"AGALASSO","Inst":1,"Status":0}
01:20:02.677 01.570 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:02.677 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:06.030 01.405 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:06.030 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:07.029 00.667 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:07.029 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:08.029 00.056 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:08.029 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:09.039 01.010 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:09.039 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:10.039 00.325 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:10.039 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:11.040 01.001 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:11.040 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:11.090 00.050 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:11.090 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:11.140 00.050 6984 evsrv: cli 03FE5F08 request: {"method":"dither","params":[2,false,{"pixels":1,"time":8,"timeout":300}],"id":1002}
01:20:11.142 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":0,"id":1002}
01:20:11.331 00.001 6984 evsrv: {"Event":"Settling","Timestamp":1420093211.330,"Host":"AGALASSO","Inst":1,"Distance":1.71,"Time":0.0,"SettleTime":8.0}
01:20:11.344 00.000 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:11.345 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:11.440 00.095 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:20:11.440 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Guiding","id":1001}
01:20:13.969 00.001 6984 evsrv: {"Event":"Settling","Timestamp":1420093213.969,"Host":"AGALASSO","Inst":1,"Distance":1.20,"Time":0.0,"SettleTime":8.0}
01:20:16.003 00.000 6984 evsrv: {"Event":"Settling","Timestamp":1420093216.003,"Host":"AGALASSO","Inst":1,"Distance":1.13,"Time":0.0,"SettleTime":8.0}
01:20:17.960 00.001 6984 evsrv: {"Event":"Settling","Timestamp":1420093217.960,"Host":"AGALASSO","Inst":1,"Distance":1.08,"Time":0.0,"SettleTime":8.0}
01:20:20.099 00.001 6984 evsrv: {"Event":"Settling","Timestamp":1420093220.099,"Host":"AGALASSO","Inst":1,"Distance":0.98,"Time":0.0,"SettleTime":8.0}
01:20:22.195 00.000 6984 evsrv: {"Event":"Settling","Timestamp":1420093222.195,"Host":"AGALASSO","Inst":1,"Distance":0.87,"Time":2.1,"SettleTime":8.0}
01:20:24.215 00.001 6984 evsrv: {"Event":"Settling","Timestamp":1420093224.214,"Host":"AGALASSO","Inst":1,"Distance":0.80,"Time":4.1,"SettleTime":8.0}
01:20:26.117 00.001 6984 evsrv: {"Event":"Settling","Timestamp":1420093226.117,"Host":"AGALASSO","Inst":1,"Distance":0.76,"Time":6.0,"SettleTime":8.0}
01:20:28.145 00.000 6984 evsrv: {"Event":"SettleDone","Timestamp":1420093228.145,"Host":"AGALASSO","Inst":1,"Status":0}
01:21:04.062 00.002 6984 evsrv: cli 03FE5F08 request: {"method":"get_app_state","id":1001}
01:21:04.062 00.000 6984 evsrv: cli 03FE5F08 response: {"jsonrpc":"2.0","result":"Stopped","id":1001}