Strange behavior when I put 'Visibility' checkbox to 'On'

Hi, there.

I saw strange 'viewscarousel' module behavior.
When I put 'Visibility' checkbox to 'On' I can switch only between severaly elements. And number of elements isn't fixed.First it was two, next three...

I saw that 'viewscarousel' module not allow to set 'size' option, that is available as showed on the page
http://sorgalla.com/projects/jcarousel/#Configuration.

Attached patch adding this ability to module.

After this patch was applied this behavior was fixed.