Because it is not level, Can I reapply the acrylic caulking once it has dryed?

You can reapply over the top of existing dry caulking, but you will get a much better result if you scrape the offending caulk and start from scratch.

I agree, better to tear old the bad job and have one smooth and level final job. It takes the same amount of caulk to do it either way so do it right