Will try and help in regards to this entry form, seems confusion is still high.

Firstly you can change the year rather than having to go back each month for every year, saves a lot of time.

You fill out the form as best you can, even with the poorly worded questions, should not take more than 5 minutes.

You will receive an email within minutes stating you completed the form and in that email there is a link which takes you back to your completed form where you can edit it.

It is possible the dates change or something is different versus what you typed earlier, simply fix those dates/numbers to the correct one. My birthday was a day off from what I typed so I fixed it.

You can always go back to the form and check again to make sure all the numbers/dates are correct.

If everyone fills out the form correctly there should be almost no line when arriving in SXM (it takes ~2 minutes from scanning your passport and exit the E-Gate), the next issue is people will complain about waiting for their checked luggage I guess!