For the words
results to get hyphenated as
result-s, somebody or something must have reset two of TeX's fundamental hyphenation-related parameters, viz.,
\righthyphenmin. For an English-language setting, the default values of these parameters are
Something in your document must have managed to set both parameters to
1 (or possibly
0). Be sure to either delete the commands that modify these two parameters or insert the two instructions above in your document (to reset the parameter values to their respective default values).