请教专家：

I drove on while the news started. Gas prices were getting high again. The race for the presidency was getting much tighter. Fights broke out when the fans of a sports team went wild while celebrating their team's win.

Finally I could take no more and turned off the radio. Silence seemed preferable to listening to anything else about the crazy and competitive world others all the time we live in. I slowed down as I entered a local town and watched the people as I drove by.

A man was helping an elderly lady out of a car and helping her walk into a store. A smiling woman was throwing some grain into her backyard while dozens of birds flew down to enjoy the food before them.

A young man was walking along ,carrying his 2-year-old daughter safely He tickled her gently when she pulled the hat off his head and they both laughed.

I laughed too as I looked at all of this kindness. Although the music was off, I felt my heart singing.

In truth, this world could use a little more kindness and a lot less competition. Kindness makes us all winners in life and shows us that we don't have to beat others all the time.

1) I drove on while the news started. - 这里使用while错误吗？应该使用when ？另外是否应该用进行时，即改成 I was driving on when the news started ?

2) 这一句A smiling woman was throwing some grain into her backyard while dozens of birds flew down to enjoy the food before them. 时态是否有问题？

为什么主句使用了进行时，而while从句却使用了过去式？while从句是否也应该使用进行时即was flying:

应该是 A smiling woman was throwing some grain into her backyard while dozens of birds was flying down to enjoy the food before them.

谢谢老师批评指正！