said by tshirt:
Yes they are probably still working on it. There can be several weeks while they dial it in and get everything balanced.
you can do the usual stuff ~~check your fittings are tight, or even remove and gently retighn with a small wrench (this can break away small amounts of corosion that can have a small effect at each fitting but sometimes a bigger diference all together. If you have actual problems or it gets worse after a few weeks you should call it in.
At this point all you can really do is keep and eye on it.