Intended or not?

https://www.chess.com/variants/spell-chess/game/54012479/17/3

Is it intended that the bishop is able to do a double jump here? I did not know that this was possible.

if your opponent casts a jump spell and you cast one on the next move then yes it is possible

Also i set -100 rating parameter but I’m being matches with people 200 below me

i'd double check but if so i can report it

Yup it's legal. Don't think of it as a jump. Think of it as you shrinking the piece. Since you shrunk the e6 pawn, both you and your opponent can jump over it the next turn. So your opponent shrank the f7 pawn on the same turn, so they can double jump over both shrunk pawns, because it's the same turn.

Another example here, coincidentally also with the e6 and f7 pawn, it's a common trick I guess:

https://www.chess.com/variants/spell-chess/game/54355701