Multiple factors play a role in coin selection. Network capabilty, coin difficulty, the available exchanges used and hashrate of the mining hardware. It isn't just about the profitability/mining reward of a coin. You can always mine your prefered coin with the solo argument in your password field.

You mentioned "programmed to occur at specific times" would it be helpful if you knew when our miners switched to their respective backup pools or I am going down the wrong path?

Nearly always 100% LTC

A graph showing coins mined instead of earnings by coin or both.

Current coin prices of the five most paid out coins.

An option to configure the colours of the website.

Current difficulties of coins, and profitability calculator for mining of those coins.