paging bug

<?page title="paging" contentType="text/html;charset=UTF-8"?>
<zk>

	<window title="paging" border="normal">
		<grid mold="paging" pageSize="6">
			<columns>
				<column label="year" />
				<column label="month" />
				<column label="cost" />
			</columns>
			<rows>
				<row>
					<cell rowspan="12">
						<label value="2009" />
					</cell>
					<cell>
						<label value="01" />
					</cell>
					<cell>
						<label value="11" />
					</cell>
				</row>
				<row>

					<cell>
						<label value="02" />
					</cell>
					<cell>
						<label value="23" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="03" />
					</cell>
					<cell>
						<label value="25" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="04" />
					</cell>
					<cell>
						<label value="28" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="05" />
					</cell>
					<cell>
						<label value="55" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="06" />
					</cell>
					<cell>
						<label value="25" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="07" />
					</cell>
					<cell>
						<label value="58" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="08" />
					</cell>
					<cell>
						<label value="12" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="09" />
					</cell>
					<cell>
						<label value="63" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="10" />
					</cell>
					<cell>
						<label value="85" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="11" />
					</cell>
					<cell>
						<label value="46" />
					</cell>
				</row>
				<row>
					<cell>
						<label value="12" />
					</cell>
					<cell>
						<label value="35" />
					</cell>
				</row>
			</rows>
		</grid>
	</window>
</zk>