You cant sort merged cells.
I would suggest that you copy into a new sheet in the same workbook, unmerge then insert a column in row A and number down a gainst all the entries, then sort by date.
if you don't get the right results, you have your original sheet plus using column A you can restore the copy.
If I a have given a load of tosh sorry but its a bit hard, trying to visulise, hope it helps though.



