Thank you for taking the time to reply.
Yes. I tested the new Gravitar before I switched administrators and it worked.
I finally understood what kodamapixel wrote in topic 728929 (link above) with the help of MichalH’s comments in http://ww.wp.xz.cn/support/topic/problem-after-transferring-posts-to-another-user?replies=4 and was able to change the user i.d.
While I’m sure there’s a way to switch them more efficiently (I did each one manually), at least it got the job done.
Found solution. I simply deselected the “aside” category. Posts are now as they should be.
I was up-to-day with WP before this happened. I try to keep on top of the updates, so whenever it became available, I installed it. This morning, after I noticed the titles were missing I updated again thinking that might help.