Dave Smith Instruments SYNTHESIZERS

hi gang,
PEK newbie here with a question about the glide feature. i take it that 
glide and potemento are the same things. i am a fan synth sounds that 
blend perfectly from note to note (a la theramin) but i haven't been 
able to get my poly to achieve this result.
i'm aware of the glide settings and where they are located in relation 
to the oscillators. i did an experiment where i used the Basic Patch 
and turned the glide all the way up to 100 (normal) to hear the effect, 
but it has some weird results. the notes bend quite slowly but not 
always and not always to the correct pitch. for instance i may hit mid 
note and then hit a higher note and the pitch would bend DOWN. 
something seems a little funky to the point where i'm wondering if 
something could be wrong with my hardware.

has any one else noticed anything strange with glide?

is there a way to make a perfect glide from note to note??

thanks!
jason