"Total:" column incorrectly centered in exam class point table

Question

When I compile the following LaTeX code on my computer (macOS 10.14.5, running MacTeX-2019 which I just updated):

\documentclass[addpoints,11pt]{exam}

\begin{document}

    \pointtable

    \begin{questions}
        \question[12] Why is the earth round?
        \question[12] Why is the sky blue?
    \end{questions}

\end{document}

I get the following output, with the "Total:" column incorrectly right-aligned and everything else correct.

If I compile exactly the same code on ShareLatex, I get this:

with the "Total:" column correctly centered.

Any idea what might be causing this? Here is the pdftex output from my local machine:

This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019) (preloaded format=pdflatex)
 restricted \write18 enabled.
entering extended mode
(./bad.tex
LaTeX2e <2018-12-01>
(/usr/local/texlive/2019/texmf-dist/tex/latex/exam/exam.cls
Document Class: exam 2017/12/17 Version 2.603 by Philip Hirschhorn
(/usr/local/texlive/2019/texmf-dist/tex/latex/base/ifthen.sty)
(/usr/local/texlive/2019/texmf-dist/tex/latex/base/article.cls
Document Class: article 2018/09/03 v1.4i Standard LaTeX document class
(/usr/local/texlive/2019/texmf-dist/tex/latex/base/size11.clo))) (./bad.aux)
[1{/usr/local/texlive/2019/texmf-var/fonts/map/pdftex/updmap/pdftex.map}]
This exam contains 2 questions with 0 parts, 0 subparts, and 0 subsubparts.
This exam has a total of 24 points.
This exam has a total of 0 bonus points.
(./bad.aux) )</usr/local/texlive/2019/texmf-dist/fonts/type1/public/amsfonts/cm
/cmr10.pfb>
Output written on bad.pdf (1 page, 15814 bytes).
Transcript written on bad.log.

Answer 1

The different behavior must be caused by using different versions of exam.cls. The log file from your local machine has the line

Document Class: exam 2017/12/17 Version 2.603 by Philip Hirschhorn 

near the top. I think I've spotted the bug in that version of exam.cls, but I'd like to be sure before I describe it here. Could you find the version of exam.cls that sharelatex is using, and show us that line from the log file on sharelatex?

Edit: Yes, I'm pretty sure that I've identified the bug. After I get a night's sleep and do some testing, I'll post a bugfix.

My apologies to all.

Further edit: I just created version 2.607beta of exam.cls, which fixes this bug. You can get this new version of exam.cls from my web page, at http://www-math.mit.edu/~psh/#ExamCls (you want the betatest version available there). You can either put this new version into the same directory with your latex file, or just use this version to replace the version of exam.cls that's installed on your system.

In case you're curious: when I reworked the table code for version 2.602beta, I left in an \hspace*{\fill} that had no business being there. I then managed not to have noticed the error through all the testing I did. (In some tables it's really obvious, but in others it either disappears or is very subtle.) The fix was to delete that \hspace*{\fill}.

@wolfson: Thanks very much for finding this bug. Again, my apologies to all.