Looking to trim some file size, and have my PC viewers satisfied!

so in my site i use the _sans Device Font in my movie. on my Mac they look beautiful, nice and crisp. however, when tested on a PC, they often get bumped around, and sometimes get left out (yet still look great). so i'm confused! correct me if i'm wrong, but when i use a device font, doesn't Flash Player use whatever font on the local computer most closely resembles the device font? if so, then why does it leave some of my text out?

what i've done in the meantime is break them apart and group them, however this jacks my file size through the roof!

do i have to embed the fonts as dynamic text? advice? questions?