Too Dry

I cooked 2 of the Maple Leaf Prime Chicken Stuffed with Broccoli & Cheddar as directed and the Cheddar leaked out from the sides and pooled in the bottom of my baking pan (photo #1). When I cut them open there wasn’t much filling left except for a bit of broccoli and they were very dry (photo #2). I cooked the next 2 by putting them on a baking rack so they were sideways (open part facing up) thinking this would keep the cheddar filling from leaking out but that didn’t work (photos #3-5). These were also quite dry.