I called on the 18th as to change to inductions (before they started sending out the collections on the 19th which I still got (the text later that day) and its yet to reflect on my account as of today even though I called last Friday to check and change has indeed been filed. My only fear is that I dont get matched or make the new build for the next boat but Im keeping my fingers and toes crossed!
I'm in the exact same boat. Have a Test drive on the 15th, and decided to change the colour and interior of the car. Send an email on the morning of the 16th, and got a reply back a few hours later to say that it will be updated in 2-3 working days.
Then the 18th rolled around, and I got matched with a VIN! Of my previous spec... on the phone with Tesla I was told that the changes hadn't gone through and was offered my original order, or to release the VIN and go back onto the pile for a March delivery. Debated back and forth, but decided 2-3 weeks extra waiting vs. 2-3 years of kicking myself for sticking with the basic White colour and decided to let it go.
Got unmatched Wednesday evening after calling, but my changes still haven't gone through! Emailed Friday night, and was told on Saturday morning that they've got a huge backlog, and that it will be processed before the next shipment. On the phone on Wednesday morning, they did confirm that it was noted on the system, before I even mentioned it.
The way it was described over the phone, if you change your order/spec, your queue position doesn't change for the next VIN matching process/cycle. You'll bounce on-top of other orders with the same spec, as long as you ordered before them. At least that's what I gathered... might not be 100% right.
Just had another look now; still got my original order/spec online.