MIDI TIMECODE ACCURACY

I am having accuracy issues using Reaper.
if I use learn timing all is good. but if I select waveform and move the marker bar to a peak. the timecode I manually type in does not match the running time. Almost a 2 second innacuracy.
I have Reaper set to 30fps. MTC .
I also note that if you slide the Reaper time bar along the clock in Onyx does not track accurately.
Is this a bug??

OK after much experimenting, I had the clock in Hours , Mins and Seconds , instead of HH:MM:SS:FF.