That's mostly water. It will catch more water when it's cold out. Water won't hurt anything.
I think the internet way over-reacts to the PTU thing. Some guys change it will every oil change will is silly, IMO. If Ford's "lifetime" fluid breaks down and looks more like dirt than oil, then the PTU is toast. But if you change it occasionally and the fluid you take out is still liquidly, I bet everything's OK.
Unless your PTU has a drain plug, getting all of the oil out is difficult. Change what you can and don't stress about it. If you flush it with diesel, makes sure you can get it all out. I can only get about 8 ounces out of mine without a drain plug.
. My local parts house sells the shit out of this brand. We put it on everything....Oh I forgot about that needle nose pliers also more or less work.
forgot to ask, what pads did you end up going with? Only reason I ask is because the stock Ford pads dust like a motherfucker