Summary:
When the content of any email template ('$FIRSTNAME' ,'$LASTNAME’) is copied, and pasted in the broadcast email message, the email when received by the users will display '$FIRSTNAME' & '$LASTNAME' tags, instead of their actual name.

In Web TimeSheet, every email template is intended for a specific purpose.

In case of Broadcast Email, the only tag available is ‘$URL’, which displays the URL to Web TimeSheet. The '$FIRSTNAME $LASTNAME’ tag is not available in the ‘Broadcast’ email functionality, and attempting to copy the information from another email template and pasting it in the Broadcast E-mail Message would not automatically populate the employees first name and last name as entered in Web TimeSheet.

Note:
The tag's supported in each template is listed at the bottom of every template as Available Tags.