Overlay mode: Random Preset ...Possiable Bug

[yourself]

I frequently use the overlay mode to get the pretty lights to appear as your desktop background. For this i set the avs to "randomly switch presets" using the whole directory of them. the only problem is that when you set a time period for the presets to change, say 19 seconds, the avs will not display ALL the visualisations, it only cycles through a few of them in a loop, and doesn’t use them all.
If you change the time interval for the "randomly switch presets" then you get a different loop of visualisations, but again not all of them are used.

Has anyone else found this and is there any fix for this??

What i want is for the avs to play all the presets, changing every 20 seconds say. (I’m not bothered about order, just that all of them are used)

Thanks for any help anyone can give me with this.