It seems to me that the width is being calculated including the custom title width even if "Show custom title" is set to No. This seems to affect how much of the title/text is displayed. Though I can't be sure, it seems like the width set in "custom title width" is being subtracted from the total width that is allowed for the title/text.
I preferred to not use a custom title, but until I set the width to 1px, the space allocated for the article title was too "short".
(Note: The only file I edited was the styles.css to change the color of the ticker background.)
Are you sure your are posting in product assigned forum?
What is your CMS version?
: Joomla 3.x
Link to installation
: Beth Joshua Congregation
Have you edited any files? If yes tell us which ones.
Is this personal or client website?