Hello!
It is possible that there is a power steering rack leak going on in addition to the pump leak you had previously, but the shop that repaired the PS pump leak obviously did not do a very thorough job of diagnosing the leaks the first time around. Replacing the pump should not cause any racxk and pinion assembly leaks, chances are the rack leak was there before and they just did not take the time to check it on the initial visit.
The fact that they missed what is obviously a fairly large steering rack leak while looking for leaks, and that they cannot repair your air conditioner, would seem to indicate that the shop you are using is not the most thorough or competent place in the world.... you may wish to take teh vehicle in toa different shop in your area for a second opinion and to have the vehicle looked over for other potential problems before sinking a lot more $$$ into it.
Just so that you are prepared when you go in for service:
A remanufactured steering rack from NAPA is $252.88 for part #22334 (conventional steering) or $590.16 for part #22335 (speed proportional steering). Installation labor time is 4.4 hours, and a wheel alignment is required after replacement.
I hope this is helpful; if so, an accept would be most aprpeciated! thanks!