This usually caused by internet interruption between you and FGMS. Try using the FGMS with lowest ping.

Yes. Go to the end (arrival) of the targeted flight. If case justifies, there will be a button called “Merge previous flight with this session” for you to merge previous flight.

"case justify" in above means:
(1) Previous flight and current flight are having the same type of aircraft;
(2) Previous flight’s end time and current flight’s start time is less than 60 seconds; and,
(3) Previous flight’s arrival location and current flight’s departure location is less than 33333 meters.

If you are having a separated flight that falls out from the criteria mentioned above, You may report here or PM me and I will merge them manually.

Currently all data fixes besides flights merging has to go through me. Data will only be altered/deleted according to the “Data handing” section of Rules and Obligations when using FGTracker (fgtracker.us.to).