New Hire - Am I Overreacting?

I started at my current company 5 months ago. When I applied, the upper end of the posted range on the job was what I had made at my job at the time. I still interviewed because this is a company I knew I wanted to work at and tried to negotiate above the posted range, but they said they couldn’t go any higher due to budgets and I accepted.

Now they’re hiring for my exact same position (same level, experience required, job description, etc.) but the upper range is 10k higher. I know that budgets probably just opened up in the new year but I’m SO annoyed because there’s no way fair market value would have changed in 5 months.

Do I mention anything to my boss? I’m working really hard to make a good impression and have gotten all positive feedback so far. I really love my company and like my boss and don’t want to do anything to jeopardize my career because I think that this could be a company that I’m with long term.