ADVMemo Code Folding Issue

I am using code folding in two ways: 

1 - In my Styler I have added a number of Region Definitions which are used for code folding.
2 - In my application the user can highlight a section of code and fold that section.

I have found that the user added code fold will disappear when a line is deleted from the ADVmemo.

If I remove the Region Definition section from my styler I can add and delete lines without the code fold disappearing.

I have emailed a sample project which demonstrates the problem and would appreciate some advice on how to resolve this.

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