What dashboard are you using? (Web, iOS, Android)
What OS? (Jessie, Wheezy)
What Model Pi?
Please describe the bug / issue. Attaching any relevant screenshots would be very helpful!
The the temperature coming from DS18B20 has been read as impossibly low at one point for some reason (-723 Celcius). This leads to a very high spread of values along the Z-axis on the week graph as show below:
The graphs for the last 10 minutes, hour and day reads as normal since the time for the extreme reading has passed on those graphs.
Adjusting the slider value (which was blank) to -10 and 60 did not correct the issue for the graph back in time, but might do so for future readings.