Although 4.3.1 by default sets statistics to use 24hrs, if you are getting more often than not erratic switching between algos and you upgraded from previous versions, perhaps checking if you are using current price or 24 hr average price under

Options -> Coins & Profit -> Statistics

using current price tend to have your miners jump between algos more often than you want to. I have mine set at 10min/5% with 24 hr avg price and they would mine for an hour or 2 on average b4 they switch...much much stable since most pools tend to use pplns and I reckon pool hopping too often with low hashrate amateur gpu rigslike mine would do more harm than good to getting paid in revenue.