I'm sorry, but I can't see any problems. Here are the last few lines from your dayfile.txt, and it's logging all of the fields:
25/10/13,5.4,180,10:40,12.5,00:38,19.3,12:23,1000.7,06:51,1008.4,00:14,3.6,04:11,3.6,15.9,38.6,2.7,15:36,75,15:35,99,01:07,0.00,0.0,19.3,12:23,21.2,11:15,13.2,00:38,2.1,06:07,12.5,00:38,17.9,10:52,12.2,00:38,227,2.4,0.0,0,00:00,0,00:00
26/10/13,7.1,315,23:45,13.6,19:30,16.6,09:57,998.1,23:47,1005.4,11:13,18.0,19:11,6.9,15.3,60.8,3.4,23:34,82,08:52,99,19:07,0.00,0.0,16.6,09:57,17.8,12:42,13.4,20:14,2.7,19:21,13.5,20:14,14.9,21:42,12.4,04:46,244,3.0,0.0,0,00:00,0,00:00
27/10/13,9.2,315,15:07,11.6,07:10,16.6,11:39,988.1,23:59,998.2,00:00,10.8,15:27,16.2,13.7,77.5,3.4,00:47,57,11:46,99,01:46,0.00,0.0,16.6,11:39,16.0,00:59,10.0,06:58,3.6,23:59,10.9,06:58,14.6,01:11,7.7,11:48,261,4.8,0.0,0,00:00,0,00:00
And when I load your dayfile.txt into the editor in Cumulus and scroll down to the latest data, it's all there:
2013-10-28 14_56_08-Dayfile.txt Editor.png
And you get blank fields after column 18 all the way to the end of the file? That's very strange.
I'm afraid I have no idea why the editor isn't showing the rest of the data for you, it's hard to see how it could avoid showing it. I can't see any errors in the diags file, and the dayfile.txt file is fine, so Cumulus is apparently working fine other than this strange problem with the editor. Does the error light flash after you've opened the editor?