Unless the pots are all anti-log pots, then they have wired them the wrong way round. If you can undo one of the pot nuts and have a look at the underside, it should say something like 500A or 500B printed on the small pit of board the tabs are connected to (A is for an audio/log pot, B is linear taper). To be an anti-log pot they should say C at the end e.g. 500C or 500k(C). But with anti-log pots, which work in the reverse direction, you'd also need knobs with the numbers running the other way, and those ones are standard. Reverse numbered knobs are rare beasts, so almost all lefties use standard pots and knobs.

So something is wrong. Using the normal pots, you don't swap the connections to them over just because the guitar is a leftie!