Subtitles Missing

What database field are your subtitles in?

It is the field: short

I’ve confirmed that short as excerpt is included in the query call per https://github.com/michael-cannon/typo3-importer/blob/master/typo3-importer.php#L1374.

Then the excerpt become post_excerpt at https://github.com/michael-cannon/typo3-importer/blob/master/typo3-importer.php#L756.

At line 762, post_excerpt goes into the post data array like all the other variables.

Hmm… can you double-check that your theme supports excerpts?