Did they give you new re-entry permit stamp in the IO or at the airport? They told me that I should ask for one at the airport, at re-entry permit counter.
Yes, I got it for free in Chaeng Wattana. In regards to re-entry permit, they told me to ask the officers at the airport. I didn't, because Covid lockdowns came and my re-entry permit expired.
I put wrong extension of stay expiration date in 90-days report few times in a row (just copying from old one), and they noticed just last time, and rejected because of this reason. Also, in my main yearly extension TM.7 form I was putting wrong type of visa on which I entered Thailand first time and they also didn't notice - I did this year, once applying again for the... 6th time :)