I'm not aware of any known problems with setting this up that I can throw out for you.
- The 2 reports that are showing up in Financials, do those show up in Power BI for you? Are they showing up differently or in different areas?
- On the Power BI site does the Financials content pack that you added work?
- You're talking about the Power BI report section at the very bottom of the Financials home page, correct? That is where you will be able to see and add Power BI reports.
Assuming you are using the exact same authentication email for both sites it should just work. I'm not sure what else to have you look at without being able to work on this over a stream with you on a support case.
Thanks,
Chris