$1000 HSA catch up pymt doesn't get pro-rated like the $3450 for a part year HDHP. Turbo shows an excess 250contribution when I enter $3587.5(9mths of $3450 and $1000)

I understand that the $1000 HSA catch up payment does not get pro-rated like the $3450 does if you only have a part year HDHP.  However, Turbo Tax keeps telling me I over-contributed by $250 when I enter that I contributed $3587.5 which is a prorated 9 months of the $3450 limit plus the $1000 catch up (not prorated).