Feeds flipped values

Hi, I don’t know what has happened here but i’m running emonSD-26Oct17 and no changes have been made in the last week except that I noticed something odd this morning and it appears that one of the CT sensors has flipped polarity.

If I look at the view from the past week or so, it was working as expected, solar goes up, import goes down.

But if I now expand on a section from today, this is what I get, with a domestic load then PLUS the solar as my “use”

I’m at a loss because as far as i’m concerned, there have been no configuration changes in either software or physical.