Do not worry !
it should be in the Recycle Bin of the Manager.

To restore the trip:

  1.  Click on Recycle   (if you can't see the Recycle Bin tab, click View and check Recycle Bin), 
  2.  Scroll down to find the deleted trip
  3.  Right click on the trip you want to restore and select "Restore".

If you see many suspect trips , this is normal , as there are many GPS interference filtered by the manager software along with the instrument logic.
We keep them in the recycle just in case something rated as abnormal is not.