im not sure, i noticed that too about the bin, but it does burn to the right size.
You mean the 782,4MB fit on a 700MB CD-R? Weird. 

Since you're not ready yet, a cue file that includes this lines:
---
FILE "disc2.bin" BINARY
    TRACK 01 MODE2/2352
      INDEX 01 00:00:00
---
would work with a disc2.bin properly?
Or do it has to include also this 
---
  REM SESSION 01        ; Not supported by other applications (*)   
      REM MSF: 00:00:00 = LBA: 0
REM (*) SESSION directives are unfortunately not properly supported
REM     'out there'.  IsoBuster however supports them !
---
stuff? IsoBuster is for Windows only, you know. I don't use this OS for years and I'm so glad that someone told me about fs_open...