Thank you for your concern and willingness to help! I really appreciate this. I don't even have to send you a project, because stuff already goes wrong with me using the Logic templates. Today I had a long talk with the guys of the Logic Studio helpdesk, which for Europe is situated in Ireland. They support 90 days after the purchase of any Apple Pro app.
They copied exactly what I did. Create a software instrument track in a new empty project. Then create a region on this track with the arrow tool and stretch this region to let's say 60 bars by dragging the rightside. Then go to the Score window (cmd 3) and make sure that you're in page mode. You see a page with the 60 bars with rests in them, because there are no notes. Now use the layout tool and change the number of bars randomly. The first 6 times are ok for me and from the 7th time I use the layout tool the layout becomes an uncontrolable mess.
The funny thing is, that they had two machine at the helpdesk in Ireland: one had the same problem I have, the other didn't. The one who didn't, had only a copy of Logic Studio 8 installed and the one who had the same problem I have, had also other Logic software installed Logic 7 and Express etc. I also had 7 installed, so the conclusion was that maybe there was a software clash, specially because I installed 7 after I had installed 8 and later on had to reinstall 8. So I did a full clean format of my system disk and reinstalled OSX10.5 and only Logic Studio 8 from scratch.
Sadly enough, I still have the same problem. The strange thing is, that the score window you can make pop up at the bottom of the arrange window works fine: in this window I can use the layout tool any number of times I want without a single problem, but as soon as I switch to the separate score window, trouble starts. For me I have to be able to use the separate score window (cmd3), because I work with full orchestra scores and need the whole display.
It took me a lot of words to explain the situation, sorry about that. Like I said earlier, I'm not the only one with this problem. It looks like there is a limitation of the number of times I can use the layout tool. Very frustrating, because the past years everything went smoothly. I need this tool to work for me because of the kind of work I do with Logic, that's a simple fact.
Time to sleep now (it's 4 in the morning)...