You should really look at the container grower forum for an education on container soils. Al

I've found that air circulation combined with temp plays a major role in whether or not the soil stays wet, as long as you have drainage holes that are not blocked (they're not on the bottom of the pot with the pot on a flat surface). In fact I do most of my propagation in plastic bags to KEEP the soil damp. Pathos will root in just about anything, even water, so you were fine in this case. Cuttings don't draw up much water from the media, but you will find that once a plant has developed a good root system that the pot dries out more quickly, which makes sense. Once roots have developed, it's always a good idea to let the media dry out between waterings to encourage the roots to 'stretch'. And then transplant into normal potting soil after rooting with a slow release fertizer incorporated into the mix.