At the Last Supper, the Savior started with the bread and then administered the water. (See 1 Corinthians 11:23-25.) The sacrament prayers in the Book of Mormon are also in that order. Since so much of the Restoration of the Gospel is about making things the way they were in the early church, in the Savior’s time. I think that’s why we eat the bread before the water during the Sacrament. Also the Lord is always specific in the way He wants Ordinances to be done. There is other latter-day revelation that discusses it in the Bible dictionary, study helps, etc. LDS.org is a great reference. Did that answer your question?

I don’t know the answer to this, but will inquire. Of course, it is not critical to the ordinance, but will see if we can find it out.