i was having a problem with my Author Content Tab, everytime it showed:

"This user has no published articles."

Only very old articles was showed.

The solution to fix this properly:

Go to line 32

and change your time zone on the first "60". For example, im in Mexico (-600) then is "-60"

and now looks like this:

Try changing the number until you get your desired result.

Im also find this post, but they comment 2 lines, DO NOT DO THAT, those are conditional for future articles, if you comment those, the tab wil show all time articles, past an future.

www.joomlapolis.com/forum/40-cb-newbies/63501-author-tab-not-showing-published-articles?limit=6&start=12