Last rows of tables have incorrect left margin

RoboHelp 9.0; linked FrameMaker 10 book. Outputting to Microsoft HTML Help (.chm).

The last rows of every table (three different table styles) are incorrectly indented -- not the borders and cell, but the text. Looks fine in FrameMaker and RoboHelp, but not in .chm file. Cell padding (left)  is the same in last row as in previous rows (both in styles and in robohelp.css file). Each cell in last row of table has this problem.

Suggestions?

--mlr