I came from eclincher, which for the price did a lot of things right, but had some issues with the interface that some of my clients found clumsy.  BUT the way they and Social Report did multi image push to instagram was easier than your push system.  The notification came as one post.  When you selected publish to instagram, it downloaded the images to the phones image gallery.  You could then select multi images in instagram, click on the order, crop and continue on.  I just published my first multi image post and discovered I had to click on one, then back out back into sendible, click on the other, go back to the gallery, select both images, and then continue on. 

This is functionality I will definately miss from those products.