Fakhruddin Shaukat

Hi I received my ACS letter on 15th June and received an invitation against it for 189 on 9th Sept. After the invitation, i noticed that ACS had misspelled the name of my university and asked them to amend it. They sent me the amended letter but that was dated 21th Oct (after the invitation date). Does this make my invitation invalid. Should i go ahead with the application or let it expire? Any advice would be much appreciated P.S I have already had to let one of my invitations expire against the same EOI, so not sure what happens, if I let this one expire too.