launchd plist seems to run continuously

I'm trying to set up a different wake/sleep schedule for weekdays versus the weekend. I'd like this plist to run at 5:30pm on Fridays. When I install this plist however, the pmset seems to run immediately, and continuously; if I try to change the settings via pmset or system preferences, they revert back to the settings in this plist. What am I doing wrong?? There is no output in the .log or .err files.

<pre>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC
"-//Apple Computer//DTD PLIST 1.0//EN" "
<a class="jive-link-external-small" href="http://www.apple.com/DTDs/PropertyList-1.0.dtd">http://www.apple.com/DTDs /PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>com.shodanproductions.WeekendSleepSchedule</string>
<key>OnDemand</key>
<false/>
<key>ProgramArguments</key>
<array>
<string>/usr/bin/pmset</string>
<string>repeat</string>
<string>wakeorpoweron</string>
<string>SU</string>
<string>12:00:00</string>
<string>sleep</string>
<string>SU</string>
<string>23:00:00</string>
</array>
<key>ServiceDescription</key>
<string>Wake up schedule for weekends</string>
<key>StartCalendarInterval</key>
<dict>
<key>Minute</key>
<integer>30</integer>
<key>Hour</key>
<integer>17</integer>
<key>Weekday</key>
<integer>5</integer>
</dict>
<key>StandardOutPath</key>
<string>/Users/nakor/Desktop/weekendsched.log</string>
<key>StandardErrorPath</key>
<string>/Users/nakor/Desktop/weekendsched.err</string>
</dict>
</plist>
</pre>