https://www.whitehouse.gov/wp-content/uploads/2018/09/Bulletin-18-04.pdf
This works for me, maybe try to copy and paste it into your address bar?
Or you can do a search for "OMB Bulliten 18-04", I found a link to the link on the first page, but no direct link to get the pdf.
Looks to be so.
Probably has something to do with Houma and Thibodeaux being in different parishes. Also, it was always part of the CSA, which apparently ceased to exist after Assumption was added to the metro. It's really weird but there's an anomaly here with Boulder MSA and Denver MSA, they are separate metros yet only 25 miles apart from each downtown.
I'd love to find the raw data to see how much travel there is between all the major corridors. I want to really see what's going on in St. James, Tangipahoa, and St. Landry parishes, even Wilkinson County would be interesting to look at.