In Word 2007 I use a paragraph separator by using the single quote followed by about 11 equal signs but sometimes when I hit ENTER, it converts my 11 equal signs into a longer row of double lines. When I have the mouse cursor placed beyond these double lines and hit the DEL key, sometimes it will erase it but often it won't erase. It won't delete them by the highlighting method. I noticed also that when I try to backspace to place the 11 equal signs to a tab stop that is at the leftmost side of my margin, the program adds an unwanted row of these double line symbols above the 11 equal signs! Why are these long rows of equal signs appearing when they're not called for? Is there a parameter that needs to be disabled somewhere? Thanks.

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File, Options, Proofing
AutoCorrect Options
Autoformat as you tupe
Apply as you type
Uncheck border options

To avoid having it turn your limited no. of equal signs (=============) into a full double line border, if it does this, it usually brings up an icon with a lightning bolt symbol. Click this symbol and deselect the Automatically create border lines (paraphrase). It should then stop doing that for this and all other documents you work on that day.
To delete existing double-line borders, highlight the text that has the borders, go to Page Layout, Page Borders and select None, OK
Sometimes it works to use the Format Painter to copy from a paragraph that doesn’t have the borders to the one that shows the border.