Coupling 1½" - Furniture Grade PVC Fitting

We bought this, but were sent 1" coupling. We were very surprised, because we had doubled checked the size of all parts we ordered which were necessary for our project. We were quite sure we had ordered 1-1/2", but the online record of our order said we had ordered 1". I thought that we just must have made a mistake in ordering. We still needed 1-1/2" coupling, so we ordered more. This time I took of picture of my order on our computer screen, which said 1-1/2" coupling, then clicked on the order button. My completed order said 1" coupling. There must be a glitch in the computer system that changes the size. If I would have thought about it, we could have possibly canceled our order. As it is, we have another set of 1" coupling coming, that we will have to return.