A rank can have two ends
The named Indian Rummy reference allows Ace next to two or king, but not a wraparound. Our checker therefore acceptsA♥2♥3♥ andQ♥K♥A♥ as natural runs, whileK♥A♥2♥ is rejected.
Two copies are not one card
With two decks,7C and 7C@2 are different physical cards. They can be entered together, but they still share rank and suit. A group is not a valid set merely because its physical identities differ.
Test the intended claim
A set needs different suits in this profile. A run cannot occupy the same rank position twice. A duplicate physical input, such as 7C and 7C@1, is a separate input error and clears the old result.
Keep notation beside the example
When reporting an unexpected result, include the exact tokens, designated wild rank and expected interpretation. A screenshot omitting the deck suffix or wild setting can hide the detail that matters.