Disklavier

Had my new DC3M4 for 4 days now...and it's developing some problems
with the Disklavier, it would seem.

#1) The sustain(loud) pedal squeaks pretty badly (piano playing it, or
a normal foot)
#2) The sustain pedal thumps pretty badly when it goes to the zero
position (piano playing it, mostly songs right from Yamaha, including
the radio)
#3) While playing the keys in quiet mode (the bar is in the way of the
strings) some notes strike a second time when letting go of the keys.
#4) While playing the keys in quiet mode, the keys (action?) feels
different...certainly not invisible.

Now, mind you, this is the 3rd disklavier we've had in the house in 2
months (DGC1b, DC3M4t, DC3M4).  The DGC1b didn't have quiet mode, so I
can't say much about that, but the sustain pedal had none of these
issues.  

The previous DC3M4t also had a quiet sustain pedal, and I didn't
notice any difference in the keyboard feeling while playing in quiet
mode...and it certainly didn't strike any notes twice.  I only played
it for a little while, so it's possible that I might have felt a
difference, but it was very obvious on the new piano (both the double
strikes, and the different feeling).

It hasn't had it's initial tuning yet (scheduling one next week), so
the tech will probably be able to adjust most of these things...but I
was wondering how common they might be.  Anyone?

Thanks in advance.
-Kevin