Thank you for your feedback.

I just made a new version (1.0.20) which corrected some of the bugs you found + some othe rimprovements:
- improved graph
- change of trigger now redraws graph
- log window only gets shown if a file is selected
- added some icons (more will come)

The other bugs/ideas I might fix/include later on.

Please see attached screen shots.
I changed the Xscale to 1 (instead 3).
This makes the real movements in the graph much more clear.
I suggest you to do it as well. Either by editing the config file (see above post) or by deleting it.
The first graph shows my sleep. At 7:40 I got up, but let the SleepAnalyser run for another hour.
Then in the 2nd graph I let it run for several hours on a table.
I am quit happy about the result, as it shows that it now should work properly and only detect real movements.