Are you using equalizers? We use equalizers and amazing base and have had to request over 90% of the formulas since they weren't updated for that base but same formulas as the older mixing base (150000PFB).
So if the formula date was from 2014 or newer, it's updated and ready to mix. If it's old (a lot of 1998/1999 etc) it won't mix correctly and needs a new formula.