tiluin

i recently installed a new clutch from RP and when i shift out of 1st, i hear and feel a ... thump from the driveline ( maybe from the differential). anyone know what causes this? do i need to adjust the clutch. also sometimes when i completely depress the clutch pedal, the clutch will engage immediately ( near the floor) instead of near the top as it usually does and the pedal wants to stick there. it actually did stick once and the clutch wouldn't disengage fully when i depressed the pedal again. i had to reach down and pull the pedal up to make it stop sticking. what is causing this?