Your loan originator should be able to send in the final set of conditions and if it is what the underwriter requested, they should not condition for anything else. If the documentation you provide them, (i.e. an inquiry explanation that you applied for a credit card) leads the underwriter to require a follow up document, that is not unusual.
Everything on that list is a normal condition required on most files. The difference is that your loan originator should have been able to anticipate some of those conditions, prepared you for them up front, and included them with the initial submission. It sounds like they took whatever they had, sent it in and are letting the underwriter determine how the should document the file. That may be a lazy approach, but in the end you will need to get the underwriter everything that she needs.
20 Years Mortgage Experience
Be prepared to provide the underwriter with your most recent bank statements and pay stubs if your loan does not close within the next few weeks.
Also, if your credit report has expired, the underwriter will request a new report and if there are any new inquiries or changes, you will have to address those issues.
Cobalt Financial Corporation
It should be noted that all of the things you listed with the possible exception of the credit supplement, should have been submitted in the original loan package. You should ask your loan officer why a complete file was not submitted. Being able to anticipate what will be asked for is a skill that the best loan officers possess and one that can save you time and frustration.