BMW: BMW Cylinder Head Resurfaced, coolant level, head bolt

Question
I own a 1992 325IC Convertible.  The engine was overheating and I checked the coolant.  It was low.  I had to continually add coolant to keep engine from running to hot.  I took the car to my BMW mechanic and he determined that the cylinder head was warped.  
He had the cylinder head machined, changed the water pump, the thermostat kit, and head bolt set.
The coolant level continues to run low since these repairs were made.  The light has come on 3 times since we got the car back from the mechanic.  Each time the light comes on, we add coolant.  My mechanic said that adding this much coolant is normal after this type of service.  Is this true?  How many more times do we need to add coolant before it gets back to normal?
Finally, the oil still looks a little milky.  My mechanic has changed the oil twice since getting the car back and each time the oil looks a little less milky.  My mechanic said this is normal as well.  He is planning on changing the oil one or two more times.  He said that it will take this many oil changes to get the oil looking normal again.  The good news is he is changing the oil at no charge.  
I just want to make sure that the above circumstances seem normal to you.  
Thanks, Brian

Answer
Brian,
 This is unfortunate, as when an engine over heats, it will usually never be the same.  If the head was warped, then the mechanic was right to have the head shaved/decked to get it true.  
 However, a cooling system on a car is like a plumbing system in your house.  If your sink is leaking and soaking your floors, would you leave it alone and HOPE it gets better by it's self?  Would a plumber come in and say "this is normal after this many years"?  
 Either YOU do not know ALL the facts about what happened, and you haven't stated them, or your mechanic is laughing all the way to the bank.  I feel as if I am missing something from the story, because I cannot believe a mechanic would say "it's alright" to problems like these.

 ANYTIME you have milky oil, there is water in the oil.  Water, heat, and metal DO NOT MIX well.  Rust WILL form, and I dont think that you want this on the inside of your engine.  If you are having to replace coolant, on a regular basis, it IS NOT OK.  Especially after paying for a head-job and it's still leaking.  The mechanic doesn't want to deal with you and he's brushing it off saying it's "normal".  You need to have this fixed or you will be spending MUCH more money.  I would take it to a TRUSTED mechanic to have it checked and then have that mechanic call your mechanic to get the details if the TRUSTED mechanic is honest then he will tell you what you really need to have fixed.  I would have the origianl mechanic fix the car correctly (FOR FREE), and if that cannot be done, then report him to the better business burea or the Police.  That is absolutely rediculous for a mechanic to take advantage of someone like this.

 Chances are the Mechanic did what he thought was right, but unfortunately it didn't fix the problem (a coolant leak inside the engine).  He may have fixed part of the problem and just didn't catch the other issues that are leaking, but either way IT IS NOT OK to have water/coolant in your oil.  
 
 If you need anymore help, please dont hesitate to ask.
 Thanks,
 Josh