Ribbing Question

[Nenwing]

For some reason when I knit ribbing, I notice there is kind of a gap look between the last knit stitch and the first purl stitch. Like say the rib pattern is Knit 3 Purl 3, well between the third knit stitch and the first purl stitch it looks almost like it is "laddering", and I don't really know why its doing this or how to get around it. I think its just where it shifts from knit to purl it makes a bit of a gap, is this normal?