Analogue systems

I just received my RS290 this weekend
and I am wondering if there is something 
wrong with mine, or, if software version
v1.0 is buggy.

I noticed the following:

* The maximum sampling rate is 46.9k 
not 48k.  

* With the feedback turned up in delay 
mode I get high frequency aliasing that
sounds like it is sampling at less than
16bits.  

* I caused the interface to hang by 
checking input and output levels.

* When manually setting the delay time
unless the knob is all the way right, or,
all the way left, the delay time is not 
stable.  I can see this by the the numbers
in the display being jumbled and hear this
as distortion in the processed output.

Are these quirks correctable? Should I contact
the shop I purchased the RS290 from?  Should
I contact AS?

Thanks in advance,

Ethan