It does seem that v3 should ignore those lat/long points with the “nr” designation as is done in v2. If you have not reported this issue, then I would suggest adding it to the beta feedback.
Regarding your description of difficulties in selecting cases on the map and then deleting them using the table, I can’t reproduce your issues. I can select map cases, then click anywhere on the table that is not one of the table rows to make the table active, and then click on the delete icon to delete those cases. Then the rescale works.
I do agree that if you hide those cases in the map and click rescale, it should rescale properly and that is a bug.
As for the “weight” attribute being interpreted as text, that is because there are some cells with the value “nr” in them, which is text, and so CODAP interprets that column as being text, so it is doing the right/expected thing here. We should probably have a better way to handle when people create a map or graph legend that has too many categories in it though.
Thank you for reporting your experience.