For the values in the charts, do you have a default persistence service defined? If yes, are you using a config file? Is this item included? openHAB will either persist all persistable items if you dont define or the ones you defined in the config file, but not the others then. I worked around by using two persistence services, rrd4j and mapdb. rrd4j for all and as default without config file, mapdb for some for startup recovery with a config file.