Hi adistom, 

I know you asked us not to tell you to check your parameters, but in the interest of good communication we need to be thorough, so:

– Are you sure DCY isn't set to 100?  This would act like the Replace functionality. 

– When you're doing the new overdub does the readout switch from P> to D> ? Or does is say R> again like you're recording? 

Answers to these question plus a detailed step by step to reproduce the bug would be helpful to us tracking it down.  

Thanks!