Copy & paste within a numbered list can cause wrong numbering
If you create a numbered list which runs over 2 or more columns and copy some text within the list from one paragraph to another the numbering changes. In my example you have 2 times 1 in the list.
To make it even more crazy this only happens when you use the Adobe Single-line composer. If you work with the Adobe ParagraphComposer there's no problem at all.
If you change the text frame from 2 columns to 1 column and back the error disappears as well.
Rainer Klute commented
Thanks to Heike Burch who discovered this bug. Together we investigated it and found the workarounds.