What Is It With The LA Times On-Line Weather?

I have 90013 put into my computer as my address (it's where my office is) and yet I often get two different forecasts on different parts of the computer.

For example - this is what I get on the LAT frontpage:

Thu 81 (UPDATE - later it suddenly changes to... 91 degrees)

But when I go to the weather page tonight - this is what I get for the overall area forecast:

Thursday...Mostly sunny. Highs in the lower to mid 70s at the beaches to the lower 90s inland.

And this is what I get for 90013 - which is within coastal plain and not part of the inland or the valley - (and we are usually at least 10 degrees cooler than those areas) on the same page:

Thu 94°

Yup. As hot or hotter than in the Valley.

Except, I then insert do a Valley zip code - and get this:

Thu 97°

Well above the low 90's - and only three degrees hotter than downtown. And it's like this nearly every day and I've e-mailed them about this for ... months. So why can't they fix it?