Problem with tactics trainer rating graph

There seems to be a problem with my Tactics Trainer rating graph. On the 20th of January  I went through a lot of problems and my rating dropped by around 150 points, which can be seen in my recent tactics table. However, this 150 point dive doesn't show up in my graph. I know it's a minor problem, but I remember somebody having the same problem with their online chess rating a few days ago and wanted to know if anybody else is experiencing this?

Thanks,

Alex

we take the highest rating of that day as the graph point, not the ending rating.

It doesn't show up immediately. If you've already regained that amount, it might consider it an insignificant drop and not graph it at all.

I see. Thank you for your answers. However I have not done any tactics between the 20th of January and today, so I think the rating drop should appear on the graph. It doesn't really matter actually...