I was told not to let DD go longer than 4 hours during the day, but mainly to help her understand day and night. (not that we ever got any where near the 4 hours to worry about it)
when DD was really unsettled and windy and wanted to feed every 2 hours I was advised to put her on the same side, so she was getting more hind milk, we did this and less than a day later she was more settled and wasnt cluster feeding 24/7!! She still only takes one side a feed too. and she isn't suffering =P so many people comment on her rolls and chubby cheeks saying I must be doing something right, and i go I am! I'm breastfeeding her! =)