If it's the Org Mode agenda view in anything close to its default configuration, those 133 items will contain not just tasks scheduled for today, but also any incomplete tasks that were either scheduled for time before today, are past deadline, or have a deadline coming in the next 7 days (IIRC, maybe it's 14).

This is to say, if you don't keep on top of current work, the agenda view quickly turns into an ever growing wall of shame.

I have a pretty weird love-hate relationship with it because of that.