BibTeX, biblatex and biber ⇒ Separate authors in BibTeX

[Pavel]

I use BiBTeX along with swplanat (Swedish language files) in LyX with author year set. The in text quotations basically look like this:

(Smith, 2005)

and in the References:

Smith, John. Title and so on. 2005

I discovered that then I have two authors Smith their works are called a and b if the works were published in the same year.

In text:
(Smith 2005a) (Smith 2005b)

and in the References:

Smith, John. Title and so on. 2005a.
Smith, Tom. Title and so on. 2005b.

I think this looks bad. The authors should be sorted as separate without a and b. Alternatively that the in text quotes looked like: (Smith, H, 2005) (Smith, T, 2005). Is there any way to do this? Or is it me who is wrong and should accept this?
Best Regards