DAExtractPageText losing characters

I am trying to extract the text from a PDF and most of it works fine but occasionally letters are missed in the extract.    This appears to be because the PDF is using octal codes for the characters.

This is the text which should be produced and is rendered correctly by DARenderPageToString:
Top Line ->  6 fyodor dostoyevsky
Space ->
Next Line -> flowers in a stuffy city apartment, but because everybody is

Here is the command extract for this same section

BT
0 0 0 1 k
/GS0 gs
/T1_0 1 Tf
8.25 0 0 8.25 262.7389 564.0571 Tm
[(\036)-100(\035)-55(\034)-100(\033)-100(\034)-100(\032)-100( )-100(\033)-100(\034)-100(\031)-100(\030)-82(\034)-45(\035)-100(\027)-100(\026)-100(\031)-100(\025)-100(\035)]TJ
8.5 0 0 8.5 83.3622 564.0571 Tm
(\f)Tj
10.5104 0 0 10.25 83.3622 543.058 Tm
[(\023)10(o)10(w)10(e)10(r)10(s)10( )-125(i)10(n)10( )-126(a)10( )-125(s)10(t)10(u)10(f)10(f)10(y)10( )-125(c)10(i)10(t)10(y)10( )-126(a)10(p)10(a)10(r)10(t)10(m)10(e)10(n)10(t)10(,)47( )-126(b)10(u)10(t)10( )-125(b)10(e)10(c)10(a)10(u)10(s)10(e)10( )-125(e)10(v)10(e)10(r)10(y)10(b)10(o)10(d)10(y)10( )-125(i)10(s )]TJ

The DAExtractPageText (option 3) returns 2 lines with an empty string and a space (or perhaps 2) for the Top Line and misses out the "fl" from the begining of the Next Line.

Is there any way I can correct this?