Yes the TR is 1.1 and when checking the timing files it seemed that all the values were divisible by 1.1 (hopefully I did not miss a simple erroneous onset value, I am checking again). The last time I used TENT I had to use the timing tool due to a TR locking issue but in that situation there was an extreme beta value at the first point (you mentioned how it is strange to have extreme values for the interior betas). Maybe this has something to do with binary numbers not being able to properly capture 1.1

I have posted the contents one of the event files (note it is tab delimited but things don't appear that way when pasted into the posting window)

5.5 47.3 69.3 135.3 240.9
423.5
163.9 273.9
141.9 247.5 267.3 375.1 397.1
5.5 271.7 397.1
350.9

Thanks again and if you want the other files I can send them your way