Sequence 1 length:3 

Sequence 2 length:6 

Alignment length: 6 

Identity: 3/6 (50.00%) 

Similarity: 3/6 (50.00%) 

Gaps: 3/6 (50.00%)

---AGC
   |||
AGCAGC

Like this. Difference between lengths is considered non-matching.

https://en.vectorbuilder.com/tool/sequence-alignment.html

I get a similar effect if sleep deprived long enough. A sense of operating on autopilot and doing things before thinking of them.