POST not selecting inputs from js added row(s)

A table initializes with one row, four cols, input type button(first row button adds a row, subsequent row buttons delete that row),input type text name Titles[], input type number name ExpYears[], input type number name ExpMonths[]. The user can add one or more rows via a button (JavaScript). I added a row, identical in types & names to the first, now I have two rows with data entered. After submitting, var_dump($_POST) only shows the entries from row 0 of the table. Is there any reason why POST would not recognize/select entries from a table row added using JavaScript?