Appreciate the updates, I think some of the duplicate requests may have stemmed from users with a different sending address for a subsequent chip order in the same batch. On the refund form, it allowed for different transaction IDs, but one single sending address (which makes sense since it needs to be signed), so an additional signed form was sent.
Thank you for coming through for the community, will be looking forward to updated instructions.
If you know how to sign a message then you don't need additional instructions. There's a few threads around that show how to do it (Canary's group buys for example iirc). My guess would be that some people missed the part in the form (or simply forgot) to take the quotes ouy of the message contents to be signed. If the message is off or different by even one character, the signature won't match and it could just as easily have come from a different wallet.
SB: I appreciate how you've handled this whole buy, and am thankful that you've tried to work with Yifu and had everything ready to go for chips. Too bad the other end of that agreement wasn't met by the chip supplier

I will be requesting a refund and be watching for another buy in the future (hopefully not using avalon chips).