the frameset you linked to doesn't include a headset, so that sounds like it's a problem with a particular bike or a ready built leader.

also, the fork is not included so maybe the guy bought one with too short a steering tube... forks for threadless headsets come with variable length steerer tubes and you need to cut them down to size... if you get one that's too small that's a problem.

they sell an IS6 cane creek headset that fits this for 40 bucks and that's a good price for a good headset.

the geometry is no where near close to another track frame, look at how different it is from the 735tr actual track frame.

most new frames that say they're track are pretty lax/road geo. it's just companies buying into the whole 'track bike' fad. the headtube angle on the 720tr is a road angle, 73.5 compared to the 735's 76. the 735 has a STEEP headtube and TIGHT angles. i'd assume there would be a lot of toe overlap on the 735.

you won't get screwed over, you just may not be able to build a nice bike for less than it costs to buy a complete like a langster or a pista.