This just illustrates the issues with the new charts, for some reason it shows a water level of 63 and that I didn't meet that on Tuesday but the recorded data is correct at 64. So essentially a quick glance at the chart suggests something other than the data.
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My feeling is that they have not done a full verification of the new graphing "update" - here are two more examples, when I look at my Sleep data it tells me that "You don't have any data in this chart" although you can see the "This Week" data shown below the chart; today this week is Sunday and the Saturday data is shown too, I can scroll through the actual data.
So I took a look at the previous weeks data and the graph only shows 6 nights sleep record, the Last Week data shows nothing for Saturday although clearly from the image above there is data for Saturday.
Fitbit devices are not "medical devices" so this means that these errors are technically irrelevant - so basically it seems that the coding is just being done but never verified. Before seeing all these issues I've always trusted the Fitbit data collections as reasonably decent estimates but now I'm starting to wonder if their data collection has the same verification level - I hope it's better ... but now I'm starting to doubt it.
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