FlatSix911
Porsche 918 Hybrid
Keep in mind that although current owners can order 2 new Model 3's, only one order will receive priority unless you own more than one Tesla. I confirmed this with the local Tesla DS.
You were allowed to order more than 2 in person as well. You just had to go back to the line after each 2.
No, that is not a glitch. I was told at the seats factory in Fremont (901 Page) where I reserved in person this AM that each person can reserve a maximum of 2 Model 3's per credit card in person. My guess is online as long as one changed the email address each time (so the database primary key is unique for myTesla login) and used a different credit card, one could order many Model 3's.