They are sorta widescreen images which I feel is making them do this extra zoom at the end of the transition. I notice on the Avia page no such effect – do you have an image size that you can recommend or any other tips to help solve this issue?
The size of the slider is 940 x 440 pixels, so you should give the pictures you upload for this slider this dimensions. Otherwise it will get horizontally or vertically stretched and give the result you have right now.
BTW: Why the long pieces of text on your slider images? I can’t even read them in the 5 seconds that the single images are shown! :)