请教专家：

I hired a car the day after landing and bought a comprehensive book of maps, which I found most helpful on the cross-country journey, but which I did not think I should need on the last stage. It was not that I actually remembered anything at all. But my father had described over and over again what we should see at every milestone, after leaving the nearest town, so that I was positive I should recognize it as familiar territory. Well, I had been wrong, for I was now lost.

I looked at the map and then at the millimeter. I had come ten miles since leaving the town, and at this point, according to my father, I should be looking at farms and cottages in a valley, with the spire of the church of our village showing in the far distance.

老师：

1）这里是not that...but that...句型，但是为什么but后面没有that呢？而且，But前使用了句号“.”，而不是"，but that..." 这是为什么呢？

2）书上说 I should recognize 是虚拟语气表委婉，I should be looking 是虚拟语气表推测，这2种说法正确吗？  如果是I was wrong - 我现在错了，文中用完成时I had been wrong 是为了强调“之前“错了吗？