well, i'm not a mod, and its a different question , as i say i have seen these closed in the past midway through
but only way i know would be to extract the number as text and convert to a number - using *1 as partof the formula and then using that column
in a new column
=MID(A2,SEARCH("n.",A2,1)+2,(SEARCH("del",A2,1)-2)-(SEARCH("n.",A2,1)))*1
then you can sort by date and then by the number -
maybe a way to do without the new column, not sure - but it will also depend on your version of excel - what is it ?
even with TEXTbefore() and textafter()