1. Where are you getting your scores from? If it's on CreditKarma (FAKO) or similar, you've gotta take the score change with a grain of salt as they score different than actual FICO08 scores.
2. All 3 Credit Bureaus (TU, EXP, and EQ) score items differently. With 1 inquiry you might lose 1-2 pts on EXP and 6 pts on EQ, it's just the way the cookie crumbles and nothing you can do about it (except to not apply for anything)
3. The reason why the # of inquires aren't matching up between the 3 credit bureaus is because when you apply for a credit (credit card, loan, etc), most companies pull different credit reports. Capital One is the only one I'm aware of that will pull all 3 of your credit reports so you'll see "Cap One" on the same date under all of them. As for the rest, many will pull a single credit report (e.g. Navy Federal, Pentagon Federal, and DCU pull Equifax mainly), whereas AMEX and CITI will likely pull Experian. HOWEVER, sometimes if your credit report isn't satisfactory to that company, instead of pulling from 1 credit bureau they may pull from two. So if a company typically pulls Experian and your score isn't as good, they might pull TransUnion as well. So now you'll see XXXX inquiry on your Experian and TransUnion but NOT on Equifax. This is why you see the inconsistencies in your inquires on each reports
4. You say your utilization went up 1%, depending on what your overall and individual utilization was, it might be enough to put you in a category that increases your rate. Just like you said about the average age of account being 5yr for an increase in score, utilization has ranges as well. I don't know them exactly but many people believe a utilization of < 10% and then between 10% and 30%, and 30% to 50%, and so on. So let's say you had been at 10% utilization before (on an individual card or overall[overall is more important btw]), and you went up to 11%, then you might notice a change in score.
5. And in case you don't already know, utilization has no memory. What that means is that unless you're applying for something (credit card, mortgage loan, etc), your utilization isn't that important. Of course you don't want your balances to skyrocket due to irresponsible behaviors, but at the same time it's not something you have to worry about with respect to scores (if you're one to monitor your scores on a weekly/monthly basis). So for instance if you're at 24% utilization and you aren't applying for a mortgage until 1.5yrs from now, then you really don't have to worry about the negative effect of utilization on your scores until 1.4 years from now. A couple months before you're going to apply for that mortgage, you'd pay down your balances and you'd see an instant increase in score after they reported. And just as they went up, they'll go back down if the utilization changes the next month. So basically, keep your utilization in check, but for scoring purposes, it won't really matter until you are applying for something. (disclaimer: don't let it get out of control as lenders may act adversely on your current credit accounts)
6. Good luck brotha