Blown diaphragm on fuel pump??? 75 Dart Slant 6

After swapping the pump I changed the oil again. Didn't have much of a hint of gasoline at all. But it did look a little disgusting after only being in the car about 2 weeks. Maybe I'm a little off due to never having older then a 1991 model year car before, and this car sat for a while and was only started every once in a while. But this seems a little dirty to me for like 5 miles of use and only idle time. I realize it may take a couple oil changes since it sat up quite a bit.

I also pulled the breather and found this kind of crusted up underneath it. Any ideas as to why this would be?