Collecting 3x points (CAN)

I went to use my employee discount for the first time today, and the manager helped apply the discount. I also scanned my barcode on the app to take advantage of my employee 3x points bonus.

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However, the manager told me I can't collect points as an employee. This occurred at a different location from where I work, which is owned by a different franchisee. Is this right? Does anyone else get to use 50% off and get 3x points in the same transaction? My understanding was that you could use both bonuses with each transaction.