Please post a complete circuit, not a fragment.
I see the voltage divider center (the "output" ) is also going off to the left somewhere... where does that go, and how does it influence the voltage divider? If that goes off to any node that has current coming from the supply rail then it will cause the voltage to go up (since it's injecting current into the divider's output node).
Any current being removed from the node will cause the voltage to go down, not up, so I am expecting that something in your circuit is injecting current into that point.
Definitely we need resistance values and it's best if we can see a complete circuit (at least more than you show there !)