AutoCorrect/AutoFormat use incorrect correction/format due to wrong option.
Cause:
Clear the AutoFormat option for automatically numbering lists and include an exception in the AutoCorrect dialog box.
Solution:
Change the AutoFormatting and AutoCorrection options.
1) To change the AutoFormatting option, do the following:
a) Select the 'Tools' menu and select 'AutoFormat...'. (The AutoFormat dialog box appears.)
b) Click 'Options...'.
c) Click 'AutoFormat' option. (The AutoFormat Options dialog box appears.)
d) Clear the 'Automatic Numbered Lists' check box.
e) Click 'OK'. (The AutoFormat dialog box appears.)
f) Click 'OK'.
2) To change AutoCorrect options, do the following:
a) Select the 'Tools' menu and select 'AutoCorrect...'. (The AutoCorrect dialog box appears.)
b) Click 'Exceptions'.
c) Type the word that should not be corrected in the text box.
d) Click 'OK'.