I've had problems like that before and there is a hidden setting that may help you. In the main browser under S7 Program right click on Blocks and choose object properties. Then go to the Address Priority tab and you probably want to select the bottom right option, which is recommended for symbolic programming and gives symbols priority. Make sure you make this change on a backup of the program as strange things have been known to happen(you know that already having obviously worked with siemens).
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