screwed up repo, i have no clue how i did it & how to solve it

[Roland Schmitz]

Hi together,

i screwed up my mercurial repository, but i did not know how. I was working 
with it since 2006 without problems, but now i broke something. I can't 
remember what i did to get to this point.
Some weeks ago i get the message that i can't push my repo to sourceforge, the 
message somesthing like "Abort: push will create a new remote head xyz
((Did you forgett to merge? Use push -f to force))"
After this i noticed my repo had 9 heads, by using "hg heads". But there was 
just the "default" branch, so i thougt there is nothing to merge. After some 
searching i found:
$ hg update -r 149
$ hg commit --close-branch -m 'Head mit id 149 geschlossen'
$ hg update -C default

I was lucky, all "8 old" heads closed, but as i noticed today, that's not the 
solution.

Actual i have:
$ hg tip                                                                                                                                                     
Änderung:        152:f3ebeb800e91                                                                                                                                                               
Marke:           tip
Vorgänger:       149:b812a484bb66
Nutzer:          Roland Schmitz <roland-schmitz at gmx.de>
Datum:           Mon Jan 28 20:32:50 2013 +0100
Zusammenfassung: Head mit id 149 geschlossen

$ hg heads
Änderung:        150:716dbb383599
Vorgänger:       147:6c015687d9af
Nutzer:          Roland Schmitz <roland-schmitz at gmx.de>
Datum:           Mon Jan 28 20:31:26 2013 +0100
Zusammenfassung: Tab funktioniert jetzt auch mit mehreren Key Spalten

What i can see is that hg tip tells me that rev 152 is my tip, but 150 is my 
head.
I hope someone can help me to understand what my error was to get to this 
situation, und next, to solve it.

Translation: Änderung = Change, Vorgänger = parent, Nutzer = user, Datum = 
date, Zusammenfassung = Merge comment

-- 
Mit freundlichem Gruss    Yours sincerely

  Roland Schmitz