Singlestate Time of last point

I don’t know if I’m doing something wrong or it’s a bug but here’s the problem I have:
I created a singletstate and in this one I set “time of last point” and “from now”. I have about 15 servers that I want to monitor and they all send me an uptime. 2 of them are offline for a while (about 3-4 weeks). However, no matter which server I query, I am always told it has been offline for 1 hour (calculated from “last value” and “from now”). Most of the servers are online. Also in graphite I am told that the values are at most 20 seconds old. I still try to upload pictures so you can see something.
Can anyone guess why this is so or is this a bug?