Don't like them and they are a faucet with too many parts for me to care for.

If it was a Delta I'd say the camber adjustment needs to be tightened to stiffen the motion but in your case I would advise going to their website, locating their faucet and downloading their PDF parts explosion and see if they forgot parts,

parts are broken,

or something needs tightening.

If you spend more than an hour trying to fix it, take it back out and buy something of better reliability/quality.