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I can't help you with the "High Balance" piece. I have always wondered if that was a big deal or not.
I am curious as to why would you use this card for all your purchases? Why not charge one thing of ~$35-$40 only? That leaves you in the 1-9% uti zone and gives you the best bump. Why chance having your full balance report? The reason I say this is because I had it happen to me when I started my rebuiild.
I was using my US bank secured card to show but missed the payoff and a balance of $485/500 hit my report. Killed my score. Just saying, be careful with that.
The high balance line is not something that FICO really looks at. Sometimes it is substituted as the CL if a CL is not reported (Think charge cards here)