Disputing an Invoice

Hi VAF!
I want to introduce myself as well as ask for some advice and support. My name is Skylar. I am 23 years old. I have been an informal VA for years to a number of local family law, franchise, trademark, and business attorneys. I work full time during the day as a front desk receptionist and I transcribe at night. I have this new client that is not organized and expects me to come in person office visits every time to pick up work. In the beginning, I would go to his office, several times and didn’t charge him mileage or travel time. I would only charge him if I stayed in his office for him to explain how he wanted something drafted. He was unprepared for my transcription services. He doesn’t dictate and doesn’t even have a digital voice recorder, which is what I am accustomed too. He is not ready to start emailing me work yet. I just go to his office to pick up sample pleadings and leave. I don’t like going to his office because I pitched the job as a VA and I already have a full time job, which he is fully aware of. I also have my real estate license and want to start drafting as a reva. I don’t charge him any extra hourly rate for in person visits. My in person hourly rate and virtual rate are the same.
However, my main reason for writing this post is because he is disputing one of my invoices. One Saturday, I went to his office to pick up a deposition notice and another pleading, a minor’s petition to compromise. He said he wanted two petitions for two girls. He did not give me a time budget. I went online and found new forms that were very different and require reading. The new forms were the same length (10 pages), but the paragraphs were out of order, and had updated language. His pleading was a much older version. I invoiced him for 3 hours for the each petition, one for Bianca and one for Diana (the names of the girls), and 2 hours for the deposition notice. want to ask other paralegals if they have ever drafted a minor’s petition to compromise? If you have, how long did it take you? How long do typical deposition notices take? Do you think I was taking too long to being unfair? I want to know so I maintain a long relationship with him. I want to know what others think are reasonable and what I could say too maintain the client because right now I don’t have as many as I used too.

Thanx so much,

SL