I think the square and ramp functions are behaving normally, If you try and listen to them at slow LFO speeds you will hear the difference. It may be possible that in some settings the two shapes sound kinda similar. If you listen to the Ramp wave at low LFO speeds you can hear the swell and the drop thus indicating that it is a descending ramp.
I think for the TAP tempo , No of cycles of LFO per beat = Tempo in BPM / 60 (at 1/4 note setting).
Hope this helps.
