I'm just not seeing anything weird. The graphs and charts show Richmond crest at 54.74 on 6/2, Rosharron at 52.56 on 6/4. The initial water comes into the river upstream of Richmond, takes a while for the peak to get to Richmond, then a couple days later peaks at Rosharron. As it flows downhill/downstream at some point along the way it starts stacking up and releasing water slower than it has water coming into it. The water is stacking up downstream at Rosharron and may start stacking up at Richmond if those conditions persist.