Creating a linked style as a new Quick Style shouldn't cause you any problems.
A linked style is a hybrid of a paragraph style and a character style; it is
marked by a pilcrow followed by an "a" in the Styles task pane. Many built-in
styles in Word 2007 Quick Style sets are linked styles including all 9
heading styles, Quote, Title, Subtitle, etc.
If a linked style is applied to a selection that is less than an entire
paragraph, the selected text will take on the font formatting of the linked
style but the paragraph style applied to the paragraph will remain unchanged.
In so doing a hidden character style in the form “linked style name char†is
created; this character style does not appear in the Styles task pane or the
Style Inspector but does appear in the Reveal Formatting task pane.
One common use of linked styles (all heading styles are linked styles) is to
apply a heading style to the *beginning* word(s) in a paragraph; doing this
not only applies the font formatting from the heading style but also tags the
selected text so that it can appear in a table of contents (References tab,
Table of Contents group, Table of Contents); the tagging only works on the
beginning words in a paragraph.
To change formatting of the text to which this type of character style has
been applied, you must select the text and either apply a different true
paragraph style such as the Normal style to the selected text or simply press
CTRL+SPACEBAR (removes the font formatting).
If applied to a selection greater than an entire paragraph, both font
formatting settings and paragraph formatting setting will be applied from the
style and the linked style will replace the previous paragraph style in all
wholly or partially selected paragraphs.
If no text is selected and a linked style is applied to a paragraph, the
linked style will function just like a paragraph style and will replace the
previous paragraph style (or linked style).
To disable the linking feature of linked styles, thereby making them
function as paragraph styles, check the Disable Linked Styles check box in
the Styles task pane (Home tab, Styles group, Styles Dialog Box Launcher);
disabling the feature removes the likelihood that you will inadvertently
apply font formatting to selected text when you intended to apply the
paragraph style (actually the linked style) to the entire paragraph.