Hello
There are over 9000+ switches in service, you would think that if this was a problem with the switch you would not be hearing good things but all bad things.
Now with that being said I suggest you install v1.3.9rc14 as it has several fixes. I would read the release notes for v1.3.9rcX and see what bugs were fixed.
Now the log entries about the NTP service starting over and over again is because you either have an incorrect NTP server configured or it is unable to get to the NTP server and will continue to continue to try and reach it and until it does you will see this entry every so many seconds. What would you prefer it do, check once and if it fails for whatever reason stop trying?
Now the CPU utilization means nothing to do with the switching functions of a switch, all the CPU does is run the UI/CLI and stats daemons as the packet switching is handled in the switch core by dedicated processors just like any other switch (not including software switches where all packets are handled by the CPU).
As far as you losing pings to the switch I would look into your network settings on your computer or look for an IP conflict on your network (meaning something else is at 192.168.1.20 already) which would also make sense about the drop down complaining about config.
The UI is pretty straight forward but we have a video tour of the switch here
https://www.youtube.com/watch?v=8JvBEAD4MFMIn the video I go over all the settings and even give you a tour of switches in service at my WISP