We are seeing strange behaviour from one of our templates.

We have an item "System uptime" that samples system.uptime, but it appears to be getting two sets of data, despite only being defined once I see pairs of updates at 10 min intervals, with uptime values that are consistent with there being two different sources of uptime value:

2018-11-02 07:08:52 1236207
2018-11-02 07:07:27 2751739
2018-11-02 06:58:52 1235607
2018-11-02 06:57:27 2751139
2018-11-02 06:48:52 1235007
2018-11-02 06:47:27 2750539
2018-11-02 06:38:52 1234407
2018-11-02 06:37:27 2749939
2018-11-02 06:28:52 1233807

I've attached the template.