When I make 50/50, I shake the stuff so that it knows it has been shaken. +1 on Wingsfan, it does make it cloudy with air bubbles.
Plus if you stored it in the fridge the VG and PG don't integrate very well until it warms. Since I do refrigerator store, I shake both cold and again when it gets warm. That non-mixing shows as a "cracked crystal" look that can seem cloudy as well. Combine the two and it looks like broken safety glass.
If you check in an hour or two, you should see the bottom clarifying a bit (but it can take a whole day for the tiniest bubbles to leave the solution).