MicKo's Skill Tree - Revised

[Mel]

I'm using this script in my game and one of my skilltree has recently reached a 5th row and now the skilltree seems to be buggy.
When calling the script and selecting the skill tree it immediately highlights the last skill in row 5 and will not let me move freely about the skill tree.

It just happens in that skilltree with the 5th row. Everything else works fine.