It sounds like you got a good amount of CCs open within a fairly short period of time (1 year I'm guessing).
Credit One is absolutely horrible. It was my first starter card when I began rebuilding after my BK. Along with a Cap One card.
Given that the card should stay on your reports for 10 years, I would axe the Credit One card asap. Keep treating the Cap One secured card well, low balances (below 30% is my personal preference), PIF when you can. Since you went on an app spree recently, I'd wait 6-12 months, develop a larger payment history with the new cards, let recent inqs fall off, hope for auto CLIs and maybe trigger some every couple months, and then finally go for some higher end rewards cards.