TDS water question

[OutsideBrian]

I am using a marine Depot stage 4 filter system. I just went to go run some water for a water change and my tds have gone into the hundreds.
But my question Why is the in tds lower than the out? These pictures are after letting in run for a few minutes but when I initially turned it on I had 400+ tds

 

[asting]

Your di resin could be holding particulates. It looks spent.

 

[OutsideBrian]

Thanks, that makes sense

 

[OutsideBrian]

Am I doing something wrong to or with my filters?
I put a new di filter on and have made 10 gallons. Two five gallon water changes.
Each time I use the filter I leave the flush run for a minute or so both before and after collecting Di water.
Today I turned it on and while flushing tds out was a few ppm higher than in even after letting the flush go for a few minutes.