"Pattern" mode in the arpeggiator is giving me patterns of seventeen 16th notes

[Kris Rhodes]

Have I accidentally changed the pattern lenght somehow? I can't figure out how to change it back if so.

When I set the arpeggiator to "pattern" at "1/16" tempo, the sequence it produces contains 17 notes, not 16. So for example if I play the sequence along with a regular 4/4 beat on another track, they quickly fall out of sync.

Is there some way to get it to play 16 notes instead?

[Kris Rhodes]

Clarification--the 1/16 tempo isn't relevant as it turns out.

The problem is it always creates a pattern of 17 notes (each of equal length--"spice" is set to zero). It seems like it should be 16 instead. Is there a way to change it to that value?