I just had a similar issue and thought it was a realtime issue but it wasnt.
The trick with SearchTemplates is you need to specify the fields you want to pass down to use in your SearchPostProcess searches.
<dashboard>
<label>Search Templates</label>
<description>An example of search templates</description>
<searchTemplate>sourcetype="mysourcetype" station="thisone" | fields _time, sectionCode, other, interesting, fields, station</searchTemplate>
<earliestTime>rt-80m</earliestTime>
<latestTime>rtnow</latestTime>
<row>
<table>
<searchPostProcess>search sectionCode=this | eval ontime=strftime(_time, "%H:%M:%S") | table *</searchPostProcess>
</table>
<table>
<searchPostProcess>search sectionCode=that | eval ontime=strftime(_time, "%H:%M:%S") | table *</searchPostProcess>
</table>
</row>
</dashboard>
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