I agree and they should too. It can form bacteria from heat and room temp as well.
a .22 micron filter (sterile) should help and a sterile vial as well, just be clean as possible with no air flow when you do your conversions and you should not have any problems.
I did have a problem with mine a long time ago it was summer when it was shipped and i let it sit for 4 weeks before using it, made me sick and no matter what i did i had gotten sick, had to scrap it.
so i hope if you need to convert it and then just add the other powders and do the math if you are to mix it with something, but remember higher concentrations can and most likely will cause more pain in the tissue.
just fyi.