[Cupid]

Yes, as mentioned many times elsewhere on this forum, it is designed to work that way.

This is because it is essential to keep the two servers independent of one another so that they don't interfere with each others operation.

It's not technically feasible to be able to cancel auctions across independent servers in a fail safe manner.

Generally Grouped items are replaceable with one another so it's not seen as so important that such snipes are mirrored.