Can I apply for a visa extension in Thailand without my husband present, and how will the extension affect my current visa expiration date?

Hello all! First, the Chiang Mai Immigration volunteers are amazing and extremely helpful. Thankful for them.

I am in on the visa exemption (on arrival, 45 days). I’ve already applied and gotten the 1st covid extension of 30 days...good until April 30th.

I went today to get the 2nd covid extension (before it potentially expires). I was given a consideration stamp and appointment for April 9th. I was told that I could come back then and get a 45 day extension. I was told that I could bring my husbands without him (even though the stamp in the passport says “in person”).

Questions:

1. Is it true that I can just take our passports without him and get the extension?

2. The 45 days will be added to my April 30th date correct?

Thank you!