When a foreigner is 90 consecutive days in Thailand, he or she has to report at the immigration office.
The form used is called TM47. You need to fill this form, a copy of personal data of your passport, a copy of DTV and a copy of entry stamp. Some offices also want a copy of TM30, the report that the owner of your accommodation has to file.
This reporting has to be done every consecutive 90 days and the counter resets when you leave the country.
First reporting ove EVERY stay has to be done in person, following reports can be done online, but for DTV most times useless because most leave the country before day 180
If you want to stay over 90 days you need a printed copy of the DTV anyway for TM47 report, so why not print it before entering the country as is suggested by MFA.
You can do 90 day reporting for all of you as long as you bring the docs, in fact you also can hire somebody else to do this for you, so I really don't understand the reason why it can not be done online, but Thai rules are not always logical.
Another option is to send the needed info with registered mail, also not logical but it works and is seen as in person.
If you plan to be only for shorter periods in Thailand during the next 5 years, DTV might be the right visa to go for, and when married only one needs the soft power activity.
When you plan to live in Thailand the non-o retirement is the better visa.
What visa did you get replaced? Normally only stamps for the current stay can be transferred, not visa that are not issued by Immigration in the first place.