When I play my SVCD on my standalone player (philips DVD 723) the playing time isn't correct!

With my stopwatch i've measured that 1 'second' lasts 1,5 seconds.
Has this got to do with the framerate?

Could this also be a reason why I cannot Fast forward/Rewind ?

I've burnt the SVCD with nero. While I was composing it I've also noticed some stange things:
The filesize I want to put on the CD is bigger than 700 Mb. But I choose the option "fit disc size 80 min" When I burnt it, it is not burnt at a size of 700Mb but 590 !
Maybe because of the reencoding from NERO? Should I chose NOT to reencode?

For me (a newbie) these are some strange things. I hang around a lot on this site, but I've read nothing that had to do with this.

Maybe you guys can help me!

THANX-a-lot

RALF