It appears that WFG just ignores xsl, because it displays both TDs.
<xsl:variable name="typeflag"><WF_PROCESS_INST_RELDATA_VALUE.REQUEST_AUDIT_TYPE_FLAG></xsl:variable>
<tr>
<td>Contract Decision</td>
<xsl:if test="$typeflag = 'RETAIL'">
<td><WF_PROCESS_INST_RELDATA_VALUE.REQUEST_RETAIL_DECISION></td>
</xsl:if>
<xsl:if test="$typeflag = 'CONTRACT'">
<td><WF_PROCESS_INST_RELDATA_VALUE.REQUEST_CONTRACT_DECISION></td>
</xsl:if>
</tr>