» CalDAV ignore the events that are in "On My Mac", to import them in Memotoo: select the calendar to export, go to "File" / "Export..". Save the file and import it here

» Turn off "time zone support" to solve the problem of one hour earlier for the recurrents events:

» If you have problems with date and hours, verify you have the same timezone in Memotoo and on your device, and verify if DST (Daily Saving Time) is activated in both or not.