I am formatting some one-page articles, each with a title line. On
the first page (only), I am losing the "title" line.
This sounds like the usual \doublecolumns bug of losing a line.
Which version of eplain are you using? To be honest, I no longer know
where the latest is, but version 2.8.1 is at ftp://tug.org/tex/ and
hopefully on ctan.
HTH,
k