Xyz and CotH. Limit reverse, etc...

Let's say you use call of the haunted to bring back a monster and proceed to overlay it for an Xyz summon. Because of the TCG rulings, would call of the haunted stay on the field? And what if you bounced call of the haunted? Does the xyz material get removed?

CoTH would stay on the field.

Also when monster is used as Xyz Material it is no longer targeted by CoTH so it will not be destroyed if CoTH is removed

Ok thank you