I couldn't find specific information regarding why Vilafranca might be ineligible for promotion despite their position in the standings. It's possible that this ineligibility could be due to factors such as financial issues, licensing problems, not meeting league requirements, or other administrative reasons typical in sports leagues.

For a precise answer, it would be helpful to check local sports news or official league announcements. If you have further details or context, such as the specific league or country, I could attempt another search with that information.