Good afternoon, we had in a way a similiar situation last year. Everything turned out to be OK though.
In spring 2015 we booked a very well-known certification body for an GFSI system audit at the end of the year, we mentioned that we wanted the certifications audit, however because the contract had a pre-audit as an option and although it didn't say whether we needed to cancel it or not they added it to the program without properly explaining it, so one week before the "audit" we got the notice it was a PREAUDIT. All hell broke loose and we had to get another standard in an unannounced audit to cover up the months we weren't certified for the GFSI and we had an official scheduled audit for the beginning of 2016 for the GFSI.
At the end fo 2015 the auditor arrived nonchalantly late (4 hours after production began) and we had the audit for the other standard. We got a great result, however, because the last time (years ago) we had that type of audit we had a small non conformity regarding pest control, and this time the auditor found another non conformance regarding pest control in another storage area, the audit turned up to be Failed because of the way the digital system worked...even though we had A+. There were a lot of emails and calls involved as the system automatically called it a failure so after a few weeks central said we were right and we got certified...but we were still waiting fo the GFSI standard at the beginning of 2016.
We got a call one week before the official schedule of the 2016 audit that they needed to change dates because of a health emergency of the auditor involved. After looking at other options, because that auditor was the only one who the certification body that could cover our scope and categories...most audits are scheduled many months beforehand so his schedule was packed and another 2 facilities also had to reschedule. We had the audit two months later and passed with an A...which was supposed to be a B but because we defended some points of non-confomance it turned up an A. The auditor didn't seem upset or anything. They're also probably used to it.
So at the end of the day it turned out to be OK. The category and scope of the audit is what they look at first to choose auditors, and then their schedule. If they're saying they need to add 2 people to watch, they're probably trainees in the auditing system. Most probably they had a shortage of auditors capable of having the BRC audit. Maybe some poeple quit or they just couldn't do it.
If anything I'd speak directly by a phonecall with the person in charge of assiging the dates and ask if the people having the audit are certified for your category and scope. Hope everything turns out to be OK.
Regards.