Heart of Gold Inhibitors

I've gone back to playing the Heart of Gold, to finish out the achievements. I reached a point on Level 4 in which I had destroyed all the Inhibitors within the time limit, saved the game, and continued playing. I was defeated before finishing the level. The achievement did not show up for me, and when I reloaded the save file, (with the inhibitors destroyed), all except the last one destroyed were in the game again. I keep trying to reach the same point again, but have been unsuccessful thus far in repeating (-and now I had only 2 minutes remaining on the clock for the time limit) the achievement. I am also having an issue of loading a saved game, and the main screen comes up, with the cursor off in the black space, and no way to move anywhere else. Sometimes it takes a couple retries of reloading to get the actual save game back, and playable. (this is happening with heart of gold, level 4-haven't noticed it with any other levels)