I actually called RBC Visa and Capital One to see what date my balances get reported to the credit bureau. My RBC card is reported on the 5th and C.One is on the 14th. I make sure to have my balances as low as possible by those dates.
Using the dates above, lets say you maxed out the C.One card by putting $300 on it on the 1st of the month, paid it off in full by the 8th, only to max it out again by the 14th. The credit bureau has no idea that you paid it off in full earlier in the month, they only see what you owe on the date that it is reported to them.
FYI, I received a Capital One secured card in November 2011 for $300. I made sure to have it paid almost to nil by the 14th of every month for a year, and in November 2012 they sent me a letter telling me they were increasing my credit limit to $1800. I have been following this routine since, and have seen a substantial improvement in my credit score.
Please note, I believe the reporting dates are specific to each person so you would have to find out what your date is and not follow the example above.
And, when I make a C.One payment, by means of online bank transfer from my RBC bank account to C.One M/C it can take anywhere from 3-5 days from the date I've paid before I see it update on my C.One account.