Post rebuild oil consumption and oil analysis

I'm bringing my truck back to the shop that did it's rebuild and would like to know how firm I should be about warranty and where to look first for the issues I'll describe. Rebuild was done 45,000 miles ago and oil consumption seems far too excessive. From the beginning it was greater than normal but I thought maybe it was just breaking in. Now it seems worse, I am down to the "add" point of the hash marks only 6,000 miles after changing my oil. I've put a whole quart in during a week of driving after that. I'm also noticing more frequent regens and 2 oil analysis since have shown warnings for elevated Lead levels. I will include the oil analysis for review. The meter on the oil analysis is done in Kilometers so 10,000 kms was when I first tested fine at 6 ppm then at 16,000 kms I tested again and got 20 ppm.
I will also include my prior oil analysis results that were done through CAT. The Red is when I rebuilt my engine.
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