is this common? it looks like it's limiting on the meter of the plugin, but on the board, the track will pop over zero, to 0.5 or 1 every so often, even though the max is set to zero.
I could be wrong but some limiters have a look ahead feature and adjusting this may help with your overs. I also typically set my limiter below 0.0 to -0.2 or more. If your session is in 24 bit and you'll be dithering to 16 bit, I don't think the small loss in db will affect the over all apparent volume of your track. I'm assuming volume is what you're going after with the limiter.