@Lindon ok so I have a hacky work around....if anyone ever gets here with this problem...
Set up your Global LFOs as bi-polar...
add a constant modulator to each LFOs "LFO Intensity Mod" section - and invert the values produced by your UI's depth control to modulate this instead of the LFOS intensity...
At this point the LFO will work correctly... but will send modulation values in inverted order, so you need to invert every "target modulator"... now your modulation should work properly, but if you are using a plotter to display the Global LFOs state, this will also be inverted...so:
set up a "dummy" sound source(a silent synth wont work) that issues no sound and add to it a "target modulator", suitably inverted, for each of your Global LFOS, (you can do this in the GAIN section if you like - it really doesnt matter where - but Im gun-shy of the Pitch section right now) now use the output of these in your Plotters...