I have a question about this device (vacancy only sensor).If I turn it on manually and then leave the run, after the vacancy timer runs out the light goes off. This is fine. But then when I enter the room, the light goes on automatically when it detects my presence. But that happens only the first time I enter the room, the following times I have to turn the light on manually (auto off works as expected always).Has anyone experienced that as well with this device? I have two of them and they both behave similarly.thanks!