Hey Bro, this is very common if you stay in the game any amount of time. You will also find this happens to Deca as well. It starts with the temp at the manufacturing site. The temp of the packaging facility also plays a part. If they are realitively cool, this will happen. At first I was very sceptical, but did melting point tests to verify. All came out great. That is not a very easy process, and best done in a lab enviornment.
The first time I came across this it was with 500 G's of deca. I about freaked! It came in an off white granular powder that had pin head sized clumps. As soon as I started the heat test the deca turned into the normal looking oil. I also spent a lot of time talking with the manufacture to verify this was in fact the case. Hope that helps Bro. TY