No it's not wrong, just something that got debated over at great, dare I say 'NSC debate' length.
Here's a summary:
I don't think there is a definitive answer. The problem is adding BHA into a season that already had 24 teams on their respective points. So if you add us (and make it 25 teams) a point above 3rd, we're still not as high as 2nd. Say 1 year 1st got 95 points, 2nd got 94 points, and 3rd got 72 points - would we really only have needed 73 points? If we had been one of those top two teams, yes, but whose to say we would have been. Or maybe we'd have needed 94 points + better GD. So a few of us thought the best guess was an average of 2nd and 3rd places to get the average amount of points a team will need to finish 2nd.
Ah okay, I see where you're coming from. Well here is how 2nd to 3rd compare, apologies for the poor formatting, not sure how to make it easy to read:
2015 Watford 89 Norwich 86
2014 Burnley 93 Derby 85
2013 Hull 79 Watford 77
2012 Southampton 88 West Ham 86
2011 Norwich 84 Swansea 80
2010 West Brom 91 Nottm Forest 79
2009 Birmingham 83 Sheff Utd 80
2008 Stoke 79 Hull 75
2007 Birmingham 86 Derby 84
2006 Sheff Utd 90 Watford 81
2005 Wigan 87 Ipswich 85
2004 West Brom 86 Sunderland 79
2003 Leicester 92 Sheff Utd 80
2002 West Brom 89 Wolves 86
2001 Blackburn 91 Bolton 87
2000 Man City 89 Ipswich 87
1999 Bradford City 87 Ipswich 86
1998 Middlesbrough 91 Sunderland 90
1997 Barnsley 80 Wolves 76
1996 Derby 79 Crystal Palace 75
1995 Reading 79 Bolton 77
1994 Nottm Forest 83 Millwall 74
1993 West Ham 88 Portsmouth 88
1992 Middlesbrough 80 Derby 78
1991 West Ham 87 Sheff Wed 82
1990 Sheff Utd 85 Newcastle 80
1989 Man City 82 Crystal Palace 81
Also the list of teams finishing 2nd ranked Highest-Lowest in points:
2014 Burnley 93
2003 Leicester 92
2010 West Brom 91
2001 Blackburn 91
1998 Middlesbrough 91
2006 Sheff Utd 90
2015 Watford 89
2002 West Brom 89
2000 Man City 89
2012 Southampton 88
1993 West Ham 88
2005 Wigan 87
1999 Bradford City 87
1991 West Ham 87
2007 Birmingham 86
2004 West Brom 86
1990 Sheff Utd 85
2011 Norwich 84
2009 Birmingham 83
1994 Nottm Forest 83
1989 Man City 82
1997 Barnsley 80
1992 Middlesbrough 80
2013 Hull 79
2008 Stoke 79
1996 Derby 79
1995 Reading 79