A newbie's question on xsl:template match=""

[sandodo]

For example

<xsl:template match = "MATCHTAG">
 <!-- do something here -->
</xsl:template>
<xsl:template match = "MATCHTAG">
 <!-- do something else here -->
</xsl:template>

which match will be used? Sometimes it is not so obvious that user does use the same match condition. Is there any method
to prevent such error-prone cases.