Inconsistency with "et al" between first and second time a citation is used

Hello,

The first time I use a citation it formats correctly.  For example:

(Hill et al. 2014)

When the same reference is cited again in the document, the space between the last name and “et al.” is removed, so it looks like this:

(Hillet al. 2014)

Any suggestions on how to fix this would be greatly appreciated!  Thanks so much.

That fixed it, thank you very much!  The tip on using “save as” instead of “save” for output styles was also very helpful.