To my understanding u wish to have listing of both time stamps in one listing.
To achieve this:
ls -lu | sort +8 >> /tmp/file1
ls -lc | sort +8 >> /tmp/file2
paste /tmp/file1 /tmp/file2 | awk '{print $1,$2,$3,$4,$5,$6,$7,$8,$9,$17}' | sed -e '1d'
I know it is not the best solution...but hope it helps
rishi