Trouble in interpreting the C.I for AUC using SPSS

I calculated AUC using SPSS and the output was: 0.623, std.Error=0.056. p=0.055. lower Bound was 0.513 and upper was 0.743

How could it be that the p value is not significant and the lower Bound of C.I was more than 0.5?

Am I missing something?