So according to Jungs definitions, you would value Se over Si?
Since you describe your understanding of how you use your sense function as interacting with outside stimuli?
Outside, being in an extroverted fashion, as opposed to Si, which has no interest in interacting with outside stimuli.
The reason I am asking is because Jungs definition of the functions differ from Myerrs Briggs interpretation and there seems to be a lot of confusion because of this. I don't think they should have switched the function order for the introverts the way they did. The way Jung describes the Introverted Thinking type, matches up a lot better with the style of thinking I have seen amoung istj's. It's valueing what you think, your personal thinking, over the thinking of the day/ what is currently accepted.
Also, saying that a person who leads with Si, which is a perceiving function, and then calling them a judger, just seems wrong to me. Jung clearly stated in "Psychological Types" that if you lead with a perceiving function you will be a perceiver.
It makes a lot more sense for an istj to lead with Ti and Se. Since Ti is a judging function.
Does this make sense?
Yes, but it would seem that you are confusing the various aspects of the cognitive functions.
Se interacts with the object where it is, as it is, while Si interacts with the object by an internal comparison process, which what is meant by "what is evoking what was."
Ti is a function of reaching an understanding of the object through an internal process of logical deduction - one which values the internal reasoning process over the external or empirical data. Te is opposite this in that Te seeks to order and understand logically, but appeals to external data.
All functions interact with the object, which is outside of self, but some interact with it internally while others interact with it externally.
Judging and perceiving are simply indicators of the direction of energy in your primary perceiving function, whether Ne, Ni, Se, or Si, while E/I indicates the direction of energy of your dominant function. So as ISTJs, our dominant function is Si, making us an introvert and a judger. This can throw you off because we do not present Si to the outside world, but instead present Te, since it is our primary extroverted function. Compare this to an ESTJ, who shares the same functions, in a different order. The ESTJ's dominant function is Te, so this makes them an extrovert, but their primary perceiving function is still Si, which makes them a judger. And like the ISTJ, the ESTJ puts forth their Te for all of the world to see. Compare this chart:
MBTI Cognitive functions | Life as a Project
You are correct that ISTJs value what they think over what is the currently accepted thought about a topic, but they do this for different reasons than a Ti dominant would. We base our thinking on fear of change and our understanding of the present being based on what worked in the past. A Ti dominant will base their thinking on fear of losing themselves or fear of statis, and searching for logical inconsistencies of the object being processed.
HTH