Yes, indeed, splitbars don't work as expected. However, please note that the discussed scenario is not officially supported and is practically a hack. I did not mention this in my previous reply, as it seemed that there were no side effects.
In order to achieve proper behavior, I suggest you to do the following:
+ remove all splitbars
+ remove all Splitter-specific classes and CSS styles from the panes (.k-pane, width, height, top, left)
+ destroy the Splitter object
+ initialize a new Splitter instance with the desired settings
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