Just got my first BRAND new guitar. Been playing all my life and finally was able to buy it right out of the store. After admiring it and playing a little bit, I noticed that the pitch is altered by pushing straight down on the neck. Like reaching for barre chords on the first 4 frets. I have played it about 6 hours total and it seems to tune-up and stay in tune O.K. But, if I lean on the neck at all, the pitch is altered. Does this seem normal?