Tried search but not working...

Tried to put about 1800+ or so roms on DVD-RW...when I did this MANY did not work which worked fine on the PC...

Then I selected about 50 or so games I really wanted...(ones I tried on the other disc mainly) then they worked fine...

Is there a limit to how much you should put on one disc? Anyone have similar problems or know a possible solution?

I know I did the same way both times...using beta 6 BTW...