Your ini file shouldn't look like that. The item you're writing to is supposed to be Test.
[Uptime]
Test=2 hours, 27 minutes
Should be what it looks like.

Your ini file looks like you're using
writeini uptime.ini Uptime %uptime
which would use the first word in %uptime as the item.

You could just use the first method and then use $readini() for the test item, but you could also just use something like
Code:
on *:sockread:uptime:{ 
  var %uptime 
  sockread %uptime
  tokenize 32 %uptime
  if ($1 isnum) writeini uptime.ini uptime #channelorsomething %uptime
}

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