SCC files not matching timeline timecode

Has anyone run into a problem with their SCC file for Closed Captioning not
lining up with the timeline timecode? We had our Captioning done by a
professional captioning company and a text file they provided, which matches the
SCC file timecodes, lines up perfectly with the timeline in Encore (since we
provided them a window burn of the timeline). But when the disc is burned, and
played back on a TV, the captions start off right and then over the course of
the almost two hour program, drift to be off by 7 seconds near the end. I
noticed that the DVD display time does not match my timeline timecode and is off
by a few seconds at least. My sources and timelines are all drop-frame, so I
tried changing all of the colons in the SCC file to semi-colons using WordPad,
but that didn't make a difference. Any help would be appreciated, as I am out of
ideas. I am trying a test now with adding the SCC file before I transcode (maybe
it didn't like an .m2v file being linked to an SCC).

Jay,

Hi Ruud,

Yes, the timecode matches the timeline...
The last line should appear at: 1:52:23:23 as shown in the .txt file that they
supplied as a reference.

--> Display at 01:52:23:23
--> Erase at 01:52:27:05
IN THE LAND OF BLOOD AND OIL.

--> Display at 01:53:15:29

I don't know what the last "Display" line is for, but below is the
actual caption file (SCC) that I opened in WordPad:

01:52:22:28	9420 9420 9470 9470 97a2 97a2 49ce 2054 c845 204c c1ce c420 4f46
20c2 4c4f 4fc4 20c1 cec4 204f 494c ae80 942c 942c 942f 942f

01:52:27:03	942c 942c

01:53:15:27	942c 942c

The 01;52;23;23 df timecode reads as 01:52:17:01 in non-drop notation. Roughly
the seven second drift you are seeing. Could be a clue in there.

You could try to use ccadj.exe (see SCC Tools Download) to convert the timecode
in the .css file.

With ccadj -td old.css new.css you would convert the timecode to dropframe.
(Where "old.css" is the name of your original file and
"new.css" a name for the converted version.)