Is this short-term memory?

One of my parents seems to have really bad memory. One day I told them (twice!) that I had auditions for a show the next day. After I told them they showed complete understanding that I had auditions the next day. There were no distractions or anything..Next morning it's time to go and they say "You've got to tell me about this stuff. I don't remember you saying anything about any auditions." So, I got my OTHER parent to take me to the auditions. I get back and tell my forgetful parent that I made the audition (yay mee!). They ask me if I had eaten or not while I was out so I KNOW they knew I'd just got home. They'd acknowledged me and everything. About an hour later they hear me on the phone and come to my room like "When did you get back from your audition? How long have you been here?" This isn't the first time i've noticed the forgetfulness but it's getting more frequent and when your PARENT who takes care of you forgets a lot it can make you very uneasy...