dtexec ssis package run twice??

Hi,

I have an execute SQL task and have the following property. I also have Delayvallidation=True

I don't know what the issue was, but when I run it with dtexec, the update statement runs twice as it added two Prefix 'P' to the data.  I'm using SSIS Version 11.0.2100.60.  Is there a bug in SSIS?

Options:

 CodePage 1252

TypeConversionMode Allowed

ResultSet None

SQLSource Type  - Direct Input

SQL Statement - update <table1> set ID= 'P' + ID

ByPassPrepare True

Thanks