Why can't you plan a multi-level dive using the RDP tables?

[FPDocMatt]

Learning about using the eRDPml to plan a multi-level dive, it appears that this is just the same as using the RDP tables but without a surface interval between dives.

So why does the Adventures in Diving manual say that you can't plan a multi-level dive using the RDP tables?

 

[knotical]

See for example:
http://www.scubaboard.com/forums/ba...onal-dive-planner-vs-rdp-multilevel-dive.html
http://www.scubaboard.com/forums/basic-scuba-discussions/159646-planning-multi-level-dives-rdp.html
http://www.scubaboard.com/forums/basic-scuba-discussions/146837-padi-wheel-vs-padi-rdp.html