Alesis Andromeda A6

I'm facing a problem with the Andromeda sequencer when using the
sustain hold pedal.

The problem is:

For a monophonic program I've made simple 4 step sequence, running C0
- C0 - G0 - C0, but the last step is a rest.
Some relevant parameters for the sequencer:
config -> kytrig = on (of course)
config -> length = 4 (allready said)
config -> lpcnt = sustn or infint
config -> monleg = on
trig -> source = pgm key trigger
trig -> retrig = off
trig -> trgvox = newest
trig -> mode = normal

When I press C3 the sequencers starts going
C3 - C3 - G3 - [rest] - C3 - C3 - G3 - [rest] - ... etc
as expected.
If I, for instance at step 3 in the second loop press C4 (playing
legato) I get
C3 - C3 - G3 - [rest] - C3 - C3 - G4 - [rest] - C4 - C4 - G4 -
[rest]... etc
also as expected (moving the base key up one octave i the middle of
the cycle doesn't restart the sequence).

But - and this is the problem - I would like the sequencer to run by
itself and only interact (changing the key) now and then. So I press
the sustain pedal and a key, say C3 and the sequencer starts and go
C3 - C3 - G3 - [rest] - C3 - C3 - G3 - [rest] - ... etc
as expected, even if I release the C3 key. 
If I at step 3 in the second loop press C4 I get
C3 - C3 - G3 - [rest] - C3 - C3 - C4 - C4 - G4 - C3 - C4 - C4 - G4 -
C3 - ... etc
Uhh this is not what I expected. It get a retrig and at the same time
the rest is ignored and the note from the 'original' sequence (C3) is
being played where I expected a rest (or rather where one would expect
a rest if one accept the retrig).

Is there any way out of this ? I've tried to modulate the env 3 level
with the velocity from the sequence (seq B as source) and it helps a
little: If I set velocity = 0 for the fourth step (the rest step) I
avoid the note being played where I want a rest, but I still have a
retrig in the middle of the cycle, though retrig is set to off and
monleg is on. 

I'm not dedicated to use the sustain hold pedal. If there's another
way of having the sequencer to run by itself without having to have a
key (physical) pressed all the time its Ok.

From test on some of the presets it seems to be an general problem.

BTW: OS = 1.40.12. 

Cheers

Steffen