Ernie:
First, don't worry---it's easily fixable.
Solvaset has a high alcohol content (or something similar---I'm not a chemist). When it's applied over Future, it can cloud or turn the Future white. All you have to do is let everything dry, then dab on a little fresh Future and gently "brush out" the clouded areas. (Sometimes a brush moistened in water will do the same trick.)
The trick is to apply the Solvaset and carefully blot away the excess, which should minimize the problem.
I've been using Solvaset for years, and couldn't do without it. But it's strong stuff. You might also get in the habit of testing a spare or inconspicuous decal from any new sheet first; I've read accounts of Solvaset dissolving decals, and while I've never experienced it myself, it could understandably ruin your day.
Keep at it. Best of luck.
Greg