As Ditchy says it could be the wrong clutch, however sometimes clutch suppliers fit compression clips on the edge of the clutch to allow the clutch to be fed through an aperture in the bellhousing that earlier models had. Once the clutch has been bolted up these clips can be removed allowing the pressure plate to clamp the driven plate ("feroda plate"). As ditchy says it should not move once all the bolts are tight. Check a\round the edge of the clutch for 3 U shaped clips