Si is about how you perceive, not something that makes you strive to perceive certain things over and over again. deciding to do something multiple times is an decision making process, even if its done unconsciously, Si is perceiving
It is hard to describe but Si can function as its own decision making process occasionally especially if the other tertiary functions are otherwise occupied or overwhelmed. On some level I am aware that my Si is running, but I don't always control the information it regurgitates to me, and sometimes when I'm not concentrating, I end up getting outdated information but because I'm so reliant on my Si being right, I don't question the information I receive until it is too late.
All this happens on a subconscious level, it is not like I purposely want to keep making the wrong move but because Si when left in charge always defaults to what it knows best, even if this "best" is actually wrong.