ABCD, I think he's saying he added a new credit line (account) and lost points, which would make sense. That's how I understood it anyway.
OP, if that is the case, adding a new line of credit can temporarily lower your score a little bit. In adding a new account you take on an inquiry as well as dropping your AoYA to 0 months and potentially lowering your AAoA across a threshold as well. A "new account" can lower your score for a few months, but most people report their scores back to where they were prior to adding the account withing 4-6 months and after that their scores are better than where they started prior to adding the account. Just think of it as a tiny step backward that will allow you to then take a bigger step forward.
