Eotech XPS problem

I just recieved my XPS2. My question is that after I turn the unit on with the up button, when I push the down button alone it shuts the unit off. I can brighten the brightness with the up button, but can't lower the brightness with the down button (it just turns off). Also, holding the down button alone when the unit is off will not turn it on (for the 4 hours turn off setting). Am I missing something or is there a problem with the unit??

It sounds like you got one with a bad button. I have a XPS & the buttons work as advertised.