Q1: If I use this card's Main effect to place a Digimon's digivolution cards under 1 of my Tamers, can I choose the order the cards are placed?
Yes, you can choose the order of the cards that are placed.
Q2: If I use this card's Main effect to place a card under a Tamer with cards under it, in what order do I place the card?
The card is placed on the bottom of the cards under the Tamer.
Can't Turn My Back! BT21-092 C Xros Heart While you have a Digimon with the [Xros Heart] trait, you can ignore this card's color requirements. [Main] Place all Digimon cards in 1 of your [Xros Heart] trait Digimon's digivolution cards under 1 of your Tamers. Then, you may play 1 Digimon card with the [Xros Heart] trait from your hand with the play cost reduced by 1 for each card this effect placed. --- [Security] You may play 1 [Xros Heart] trait card with a play cost of 5 or less from your hand or trash without paying the cost.
Can't Turn My Back! BT21-092 C Xros Heart While you have a Digimon with the [Xros Heart] trait, you can ignore this card's color requirements. [Main] Place all Digimon cards in 1 of your [Xros Heart] trait Digimon's digivolution cards under 1 of your Tamers. Then, you may play 1 Digimon card with the [Xros Heart] trait from your hand with the play cost reduced by 1 for each card this effect placed. --- [Security] You may play 1 [Xros Heart] trait card with a play cost of 5 or less from your hand or trash without paying the cost.
Can't Turn My Back! BT21-092 C Xros Heart While you have a Digimon with the [Xros Heart] trait, you can ignore this card's color requirements. [Main] Place all Digimon cards in 1 of your [Xros Heart] trait Digimon's digivolution cards under 1 of your Tamers. Then, you may play 1 Digimon card with the [Xros Heart] trait from your hand with the play cost reduced by 1 for each card this effect placed. ---