I have no trouble believing in 6 literal days of creation. God said that in Genesis chapter 2 verse 1,2. It is a clear teaching. But to say that God destroyed the earth to the point of making it void in chapter 1 of Genesis, that is not clear teaching. It is an assumption -and not worth splitting fellowship over. I went to a seminary where one professor believed it. It was ok. It was not something everyone at the seminary was forced to believe - I didn't believe in the "gap theory" then and I do not believe it now. My faith is not complex - it is simple. When God wants us to believe something, He tells us. He doesn't leave his teachings in dark ambiguity, it is out in the open and it is clear.