Gary, if you've sprayed suffient wetting agent on the area, either "wet" water or water/alcohol mix, the diluted glue should be absorbed into the ballast very readily. When the ballast started to float onto the ties, a shot or two of wetting agent probably would've rectified the situation. Because the glue is absorbed so readily, when it begins to run out at the lower edges it usually means that you've got it well-saturated. The glue will continue to pool for some time after you stop applying it, too, but don't worry about it. Throw a little ground foam into it, give it a shot of wetting agent, and it'll eventually dry and you'll have your groundcover already started.

I find that the hardest part of ballasting is waiting for the glue to dry: I had some pools that, even with ground foam dumped in, took almost a week to dry.
From what I can see in your photos, it looks fine to me. I do have one suggestion, though. If your camera allows it, use the option for fluorescent lights: this will correct the colour imbalance caused by almost all fluorescents, and give you more of a natural colour, which will also help to show the details.
Edit: I forgot that your layout is on foam. It's unlikely to soak up the excess glue like plaster does,

so either use some ground foam, or mop up the excess, as Josh suggests.
Wayne