Hi There Linda . . .
Nope, that is not pineapple effect. "Pineapple-ing" affects the foliage, not so much the rhizome. Your rhizomes look wonderfully healthy!
From the looks of it, your iris was transplanted about 1 1/2 inches (4 cm) too deep. You can tell from the smaller rhizome on the left, below the large one with 2 fans/1former stalk. Also, what gives away the depth of planting is where the green leaves meet a white base of the fan in the far-left/smaller fan of that clump.
You know, looking at it, I can also see where that smaller-left-fan is going to make the same "tube-shaped rhizome" so that it can grow closer to the surface. You can see where the white bases of the leaves join, there is a white stem that connects it to the old rhizome at the base of the photo (Photo 1). It kinda looks like the base of a Green Onion that you'd use in a salad . . . but I guarantee from first-hand experience that you DON'T want to cut up this white flesh for your salad! (Iris rhizomes are especially poisonous.)
I have some iris just now growing "pineapple fans", and I'll have to snap a photo to share with ya. It's not a pretty sight, but interesting, none the less.
President - Mio Irisarians
Zone 4 (and a half . . .J)