Resolving Calculations and Formatting Issues in My Trading Journal

Is someone familiar with this?

I purchased a key from Gamersoutlet and activated it on Microsoft. I've heard that it's legal since it's a valid key, but I'm starting to wonder if this could be the issue. Should I have bought a subscription directly from Microsoft?

Could this also be a reason why the product isn't working properly at my home? Excel doesn't calculate correctly, and there are issues with "," and ".". I feel like getting a subscription might not solve this problem. I've also considered that the key I bought is from a different country although it's labeled as GLOBAL. So, it should work, right? Curious to hear your thoughts on this.