Addendum
Further confusion: I tried changing templates to see if that would make a difference, but the sidebar is absent in templates that I didn’t even change the coding in.
I am also having sidebar problems (didn’t have any until now, though, and I haven’t modified any coding in weeks).
My sidebar has completely disappeared, right after I made my 55th post.
Can anyone help me get it back on the page? (My HTML and PHP skills are not at a high level, so you might need to dumb down the jargon a bit.)
Here is the URL:
http://mikecade.com/blog1
Thanks in advance to any who offer help.