Hi Luci Widdowson,
I have just updated the plugin to version 1.1.2, which contains a fix for this issue. Our Slider now detects if the site is using jQuery Masonry and asks it to recalculate positions each time the slide changes. This ensures that Masonry is given the chance to recalculate positions as our Slider changes its height.
This works on our test environment where we have reproduced the problem, but I would love to hear back about your experience with it. If this change does not resolve the issue for you I will continue working on the problem.
Thank you for your patience and for bringing this problem to our attention, so that we can improve the plugin for everyone.