Reviewing your images I can note that we presented a server downtime during that period, for that reason the value was not updated properly. Can you please try again and let us know the behavior?
Yes, it works OK now, but I can see that there are some issues with the server last days: http://status.ubidots.com/935092
I hope there are some temporary problems only.
Thanks for your note. Although we can never predict a bug or server attack, we work hard to mitigate these and all other downtime risks. The intermittency you experienced was the result of human error over the weekend and you can be assured the issue has been identified and solved.
If you have any additional questions, please feel free to let us know.