Ok the tuff about Tbol having 6 week detection period isnt altogether true.. it actually has a very short half life, and how long it remains detectable varies wildly from person to person.
Could be out of your system in a week, could be there as long as 6 weeks, but this 6 week thing is coming from Frank, we just have his word on that. doesnt mean it is in everyones system for 6 week.
Larry Pepe actually covered it really well in his podcast this week. about 2/3 of the way in. (episode 400)
http://prommaradio.com/2016/04/30/pro-mma-radio-400-final-chapter-of-the-mcgregor-ufc-200-drama-legal-troubles-ped-problems-usada-q1-numbers-mma-headlines/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+ProMmaRadio+(PRO+MMA+RADIO)
Larry gives a really good oversight on the whole Mir situation and is pretty well bang on the money. And he knows heis stuff as far as steroids go. Hes c ertainly more reliable than the Frank and Chael show
but the 6 week thing i very very innacurate.
Second point of note. The February and March samples went to different labs. Lab can have diffferent LOD (Limit of detection) and LOQ (Limit of quantification) depending on equipment, analysis method etc. Its perfectly possible that Tbol was in his first sample, just not detected by that particular lab, but was picked up by the second (tokyo) lab.