Well a lot of contracts from several contract pacts (I have 5 installed) are just quickly "blink in and out" of available. For example from the bases contract pack the only available contract: "build a base around kerbin" constantly shows as available. But before I can click the "activate" button it blinks out again. And then less than a second later it comes back in.   Can this be due to having 5+ contract packs installed?