When the data is imported into the ArcSight Manager, all the rows are imported. However, by default, only the first fifteen rows of data are displayed in Select Column Headers for the <Resource Type> Data panels.
To increase the number of displayed rows, add the property usecase.networkmodeling.maxrowfortable to the <ARCSIGHT_HOME>/config/console.properties file and set the value of the property to a number greater than fifteen.
Refer to the topic, "Managing and Changing Properties File Settings" in the ESM Administrator's Guide for procedures to edit properties files properly.