address: VqSPcvUXVc2tg9sFSKHS8kKGNNZXYTG5sx.2
that .2 on the end makes me think someone has gotten access to your minera, and this is the second machine they have pointed to mining on that address.
means they can keep track of how much they earn of each hacked machine, but still only use a coin address so as to make it harder to track. (ie not a registered user at the site)
I'd hazard a guess that there is some 'backdoor' or default password in minera or something minera is including by default.
Whomever 'VqSPcvUXVc2tg9sFSKHS8kKGNNZXYTG5sx' address belongs to appears to be mining with several machines I was asked to look at this week (and managed to switch the miner and blow up a psu by massive overclocking on one !)
So far I've seen eight different minera users who've been hacked and had mining co-opted to the same address (but different bits-after-the-dot)