Digging around and asking to my work colleagues, I find out that to get this behavior the column must be in number-type format.
Inserting a text to columns in that row to ensure that is in number format I have solved my problem.
Columns("A:A").Select
Selection.TextToColumns Destination:=Range("A1"), DataType:=xlDelimited, _
TextQualifier:=xlDoubleQuote, ConsecutiveDelimiter:=False, Tab:=True, _
Semicolon:=False, Comma:=False, Space:=False, Other:=False, FieldInfo _
:=Array(1, 1), TrailingMinusNumbers:=True