Despite your earlier assurances to the contrary, there are clearly two different species here.
1 & 6-14 Dark-sided Flycatcher
2-5 Asian Brown Flycatcher
The Dark-sided has a smaller, shorter bill with a more restricted base, a smaller, more domed head and a longer pp. In addition you can see the more solidly dark breast sides with more defined streaks towards the centre of the breast and dark centres to the utc's. Further, the pale lores are indistinct; note on the Brown they are solid and extend to the forehead.
Grahame