Hi and welcome!
Sometimes the bottles do break due to pressure changes, it does happen sometimes. Sending a quick message to Androstics and they will ship you a new one free of charge.
I would recommend to stick with one company and don’t mix it. Its very hard to tell which product gives what effect if you are combining them both. I usually don’t mix them with other products & perfumes since they already smell great on its own.
The Future of Pheromone Technology: The Golden 13 Molecules. gives a nice general description, however I don’t know if there is anything on the forums that can tell you the general description of all products they are currently carrying in the store. Most of the MX mixes are mixes that are made by the lab for testing and the effects of the putatives are only visible for reporting users to prevent people from getting bias effects. I generally prefer to refer them to the name on the product and test them blind, so I always am curious to see what happens next.