Hi Willum,
I have done what you said and it still goes back to the original tempo I recorded it in. Unless I have misunderstood you I have done the following:
I went into RECORD & EDIT, clicked on STEP RECORD and can see the tempo in the upper right hand corner. I changed the tempo setting with the wheel (even activated the cursor) and soon as I leave STEP RECORD to PANEL WRITE, it pops right back to the original tempo before I can PANEL WRITE. I also tried fooling it by changing the tempo and renaming it. The new tempo setting stays, I use PANEL WRITE, go into RECORD & EDIT, bring up PUNCH RECORD and I am right back to the original tempo that I don't want. Also, I have tried leaving PANEL WRITE after I have made my change and go to SEQUENCER PLAY, It goes back to the original tempo.
I thought perhaps my PANEL MEMORY wasn't working with PANEL WRITE but I can make any change with no problem except the tempo change. As I have said, I have reset the PANEL MEMORY tempo change but the SEQUENCER overrides it. I know I have been able to make this change in the past, though seldom done or needed but now, I can't seem to be able to. I even tried saving to disk, the new tempo change and reloading it and it comes back to the original tempo setting.
I probably have misunderstood you.