No. You said I recalled incorrectly. I was correct. You were, once again, pulling it out your butt. Now you are just trying to weasel out of it.
The provisional government of Ireland led to the Irish Free State. Eamonn de Valera was head of the provisional government and later elected head of the government of the Irish Free State. When it became the Republic of Ireland, that same Eamonn de Valera became Prime Minister.
The partitioning agreement was entered into by Michael Collins, not Eamonn de Valera.
The war for Irish independence from Britain was NOT known as the Irish Civil War. That came later. The war for independence was the Irish Rebellion or Irish Revolution.
We are most definitely NOT saying the same thing.
Your claims of "back when" implied he was always the president of Ireland. He was the provisional president, he quite just like the whining Confederate leaders, and his leaving and his facton's opposition caused the Irish Civil War (with the Brits backing NOT de Valera, but the Free State).