waheguru ji ka khalsa waheguru ji ki fateh ji
we have 10 paatshahis or mahallas( literal meaning - house ) but despite of different bodies they all are one
"anek hain || fir ek hain || "
all saroops carried the same jot of the eternal,omnipresent,omnipotent lord akal purh ji
after guru gobing singh ji merged with almighty the guruship was passed to shabd guru saroop akalpurkh dhan dhan sahib shri guru granth sahib ji which is PRAGAT GURAN KI DEH
guru granth sahib ji is same as all 10 saroops and is eternal ever living guru of khalsa panth and the entire world
guru ji is embodiment of all ten saroops
and guru gobind singh ji also reside in his beloved panth as its soul and guardian
guru khalsa panth can also lead and guide the in form of as institutions like takht sahibs and panj pyare's
so in a way khalsa which is the roop of guru gobind singh is also a guru
khalsa mero roop hai khas ,khalse me haun karo niwas"
to say numbers like eleventh and twelfth, in my opinion would be wrong as it depicts as a succession from previous saroop to next one , if put in that sense!
as guru gaddi went from first paatshahi to second (although the jot is same no doubt in that)
but now after 10 paatshahis the gurgaddi is wid "dasa paathshiya di jot" (not 11th!) dhan dhan shri guru granth sahib sache paatshah ji
and there can never be this type of succession like from 10 to 11th to 12th ...