REST Question or Bug in SubLineItems w/ orderId specified

Hi --

I'm trying to get the subline items for a package in constituent package history, so I'm using this:

TXN/SubLineItems?constituentId=34183&orderId=42669

But it's returning 222 rows, which seems crazy.

The sublineitem numbers are repeated.  

I attached the results if anyone can make any sense. 

Thanks

-- Alan