1-->2-->2-->6-->2-->2-->2(I hope I remembered it correctly), I was told that if it's VSC or CSC, it'll take 45 days to send the receipt. But one time a lady told me that she could look for my case if I was petitoner or the lawyer. Yours is over 45 days, you should have your petitioner or lawyer check with CIS.
Good luck and pls keep in touch.