We have problems with edit conflicts too. I opened two sections of http://it.wikipedia.org/w/index.php?title=Wikipedia:Sondaggi, I made an edit in the first http://it.wikipedia.org/w/index.php?title=Wikipedia:Sondaggi&diff=450468&oldid=450467 then in the second http://it.wikipedia.org/w/index.php?title=Wikipedia:Sondaggi&diff=450469&oldid=450468. First edit was overwritten but I didn't get an edit conflict.
AFAIK edit "conflicts" with yourself are intentionally ignored; I guess it is supposed that you know what you are doing. Although I guess that the idea to _merge_ the changes if there is no merge conflict would be a wiser one.
-- [[cs:User:Mormegil | Petr Kadlec]]