Sounds to me like their system is broken, and the cancellations are automatic. They will still honor the preorders when stock comes in in August. Keep in mind, no retailer anywhere has gotten Rodimus, the Ark, or G2 Ramjet yet. I don't know how we can be so upset at something that is, at this point, beyond our control, and beyond TRU's control.
Ok, their online ordering system is broken and they need to fix that, but they appear to put measures in place to keep the order for when they get stock, and gave us the option to cancel that if we find it elsewhere. Reading the email, instead of seeing the word "cancelled" and immediately seething in nerd rage just didn't seem like the best option for me.