Exchange Mail Settings

In my mail setup, I have 2 accounts (1 Exchange 1 Gmail), I have it set to display 100 most recent messages.

I just noticed that in the Exchange settings there is another option to only download 3 most recent days (this was default), and it appears that this setting is over riding the 100 most recent preference.

2 questions, has this always been the case with Exchange or is this feature new? Is there a way to disable the "days" setting so it only displays 100 recent. I set the days to "no limit" and my phone tired to d/l my entire inbox (~3000 messages).

Thanks

I think that I only noticed this due to the holidays since less emails have been sent over the course of the past week or so. I am allowed to change the settings from 3 days to whatever I choose (1 week, 2 weeks, and so on), I just never paid attention to this setting do to the amount of emails I recieve. Always thought it was cutting off at 100 emails.