Can you give us an example of the chords you are playing? If you play an open E chord you will finger fret 2 on the A and D strings and fret 1 on the G string. You will strum all six strings to play the chord. If you play an open A, you will finger fret 2 on the D, G and B strings. You will only strum the A, D, G, B and E strings, missing the thickest (E) string.