seq stops playing all sounds, but they are there!

hey! i think this is my first post in this forum. i love it and read a lot of threads. but this time i couldn't find this topic in any other thread:

i recorded a sequence, about 10 tracks, 40 bars. they were playing fine, no problems. but suddenly, without doing anything, the seqence stops the playback at bar 8, it just sounds as i deleted all notes. but they are all there, i checked them in step edit. switching my 1000 on/off didn't change anything... when i start playing later, bar 10, 15 or 30 it stays quiet. only when i start at track 38 (?!) i can hear my seq again. wtf?

by the way, some other problem that really bug me:

* in step edit, shift + step doesn't work. it jumps to the next note (foreward) or doesnt move at all (backward). if i dont push shift it jumps whole bars.

* in seq edit, copying midi-tracks only works every 2nd or 3rd time. otherwise the copied track is created but blank.

i love my 1000, but what is this? can anybody help me please?

hope you understand me.
cmd rbt.

sounds lke an issue with the move function...have you used that?

gotta bring this up again.

at the moment, i'm woking on a midi-only seq, i don't use any samples, just 6 midi tracks over 90 bars. i assing them to different sounds of my synthies.
now i'm experiencing the same problem again:
all sounds suddenly cut off after bar 78, without any reason. the seq keeps playing until the end and if i loop it starts with sound again from the first bar. if i check step edit during playback it got stuck at bar 78, i can see the following notes (ie c1 80.3.48 etc), even if the bar-couter shows i'm already at bar 87. when i stop and play from bar 80 i can hear the rest of the seq without any problem.
can't be something with polyphonie or too many notes used, its a simple seqence.

what can this be? i experienced this (as in my first post) with os v2.1, now i work with v3 b16.

i'm sure nobody can help me with this, but at least i'll try. sucks!