Hi @gdsTechJay
What you have found is not a bug, but simply a limitation in the interface. The auto-complete that is displayed when typing {{ or building an expression includes the 0 index for all arrays, and doesn’t include any further indexes. This is because when you are building the rule, MSPintegrations doesn’t have any way to determine how many indexes might be present.
If you need to use a different index in the expression builder, hold shift when adding the stanza and free-from enter it. You can see my notes here that answer a similar question.
Let me know if you need more specifics.