JDMFairlady280Z

Hey guys, on my 2000 daily civic lx a pretty annoying issue has come up. I always drive with the a/c on and the vents close to keep the cool air recirulating. When i would turn off the car and turn the fan back on the a/c would already be switched on from before and the vents still closed. Now since last week every time i turn off the car and come back, the a/c button is off and the vents button too (the vents open themselves up now because of this every time i turn on the car) So when i turn on my fan i have to press the a/c button each time i get into my car and reclose the vents...its very annoying, any reason why this would happen??? Thanks in advance