I just read a few reports on formation sightings and one report is almost identical to mine.

I woke up this morning at about 5am I went to open my back door to have a cigarette.  I was glancing up at the sky and saw what I thought was a satilite.  I stepped out on the deck and noticed another one directly in front of it and at that moment I realized they were not satilites then another one was directly behind it.  I began to count them and counted around 25 but I needed to take a shower and leave for work. I also noticed that there was one that flanked the others.  They where headed from the north heading towards the U.S border.  I am not sure if there where more in the front of the formation before I came outside and I'm not sure how many continued after I took my shower.  The formation had ended by the time looked again before leaving for work.