Fisherman, what you said about accounts in the Bible of God appearing and of angels being addressed as Jehovah, might be the way those biblical accounts were meant to be interpreted, but I lean towards a different view. When I contemplated those accounts a number of years ago I was thinking those accounts have internal contradictions, and/or contradict other parts of the Bible. In addition, now I see it as possible evidence of the scholarly documentary hypothesis that some stories in the OT are a combination of conflicting sources from two or more areas - namely those from the northern kingdom (Israel) who primarily called God by the title/name of Elohim, those from the southern kingdom (Judah) who primarily called God by the name of Yahweh/Jehovah, those from the Priestly class, and the Deuteronomist source.
Note for the example the following. Genesis 32:28-29 9 records an angel as saying that Jacob's "name will no longer be called Jacob but Israel", but 2.5 chapters later, in Genesis 35:18 says God tells Jacob "no longer is your name to to be called Jacob, but Israel your name will become." Notice that in one case an angel is saying the name will be changed but that in another case God is saying it. The latter part of 35:18 says "And he began to call his name Israel" yet verse 14, 22, 27, and 29 still say Jacob even though verse 21 says Israel, and 36:6 says Jacob instead of Israel, and 37:1-2 also says Jacob instead of Israel. It is odd that chapter 35 keeps switching back and forth from the use of the name Jacob to the name Israel, but the idea of somewhat conflicting documentary sources being used makes sense of this.
