When and how do they usually communicate to the familys what company they are in. I'm assuming the shippers from 8/25/15 are Uniform 191, but heard there was 127 so wasn't sure if there were 2.

Just got a letter in mail today, our son is in Victor-191, so there must be 2 companies for the 8/25/15 group the other is Uniform-191.

Excellent news on receiving a letter! Yep, split companies happen and that's why I never attempt to guess. I just looked at the official CG website and nothing has been posted yet about the 08/25 shippers. So this is good info to have. Best of luck to your soon to be Coastie!!

How do they handle 2 different companies graduating on the same day like the 8/25/15 shippers that will both graduate on 10/16/15 as U191 and V191.

Just like that. They will have graduation, just as it is. Announce U191, their CC's and graduates. Then announce V191, their CC's and graduates. You will have to sit and watch both companies but that's ok, just that many more new Coasties to cheer for. Everything else will remain the same time, format, location, everything.