小中大
1. as wfayew said, measure your protein concentraion, load more proteins. Since the actin bands are very faint, how can you expect your protein bands to be clear...
2. Load positive control---so that you will know if the problem is from your samples or the antibody.
3. Change the antibody---they will send you another one for FREE, why not call them? ps, you can also ask the custom service for some advice.