Man, tough questions, tough answers!
In a nut shell, Strong Lifts is garbage. You’re super inexperienced and you’re already outgrowing it and finding all its holes and problems. Using your tracking web site charts reveals that the program is garbage.
Tracking websites are kind of arbitrary. But everything in this hobby, from the weight on the plates, the size of the barbells and how you measure them is arbitrary. You have to stay motivated and excited about lifting, so if the graphs help, why not use them. Internet tough guys might give you a hard time though.
Linear progression and beginner gains are kind of a fantasy fairy tale. It’s like a 5-6 week “quick fix” passed off as a real long term, all encompassing approach. The idea that every workout must be your heaviest workout ever, for 3 sets of 5, or its not progress is absurd.
If you need more practice/technique on bench, I would bench more. Maybe lighter on the 2nd day for a bunch of low reps sets. Like 8 sets of 3, sub maximal to work the technique. And after benching you could do some work for your upper body. “Dumb” stuff like Dips or pushups to bust ass without worrying about technique. Or dumbbell incline bench, close grip Bench, etc to press at more angles and learn technique through slight differences in execution of the bench press.
Now you could see this as derailing your linear progression and beginner gains. Or you could see it like prolonging and expanding your beginner gains.