Just for clarity, the "estate solicitor" is your legal representative in these matters, the executor's solicitor; as the executor, you are the instructing client.
Are the queries the result of omissions or errors by your solicitor? If you don't know, ask.
Who knows what the probate office might find; the response(s) from your solicitor might trigger another query.
I have no idea how scheduling work at the probate office operates. I would assume the revised application goes to the back of queue. Your solicitor would know what happens to new work vs re-work.