A few years ago, I did a drain, filter replace and a refill of oil on my '71 Cougar with a C6 tranny. It takes type "F" oil and I started the refill with Super Tech oil. Halfway through refilling, I switched over to Pennzoil type "F" and after I added the first quart of oil, I noticed all the sediment at the bottom. Didn't bother me a bit, especially knowing this oil had probably sat on the shelf for a few years. I added oil back to the Penzoil bottles, shook it up and added it. It was foamy, but most of the sediment had broke up and didn't bother me knowing the sediment would get fully broke up getting battered around inside the transmission. I added some of the Penzoil back into the Super Tech oil and shook those bottles around also. There was some sediment in those containers also, it was just harder to see because the jugs were blue.
I now shake engine oil containers before pouring them in. Nothing to worry about.