A discussion of "high card" PT stats

[kapw7]

After moving to 3/6 SH I have been reducing my river folds considerably when heads-up, with good pot odds etc. Of course this resulted in calling more with A-high for example. Looking at my PT stats it seems that my high card stats ("show only hands that were not folded" checked) are slightly on the negativeside. This could be just variance (<20K hands sample) but my main point is:

Do I need to worry about having negative stats?
Say I have A-high and it is 1 bet to me on the river. If I call and win then fine. If I call and lose then I hit the neagtive. If I fold then the stats stay unchanged but in fact I may have lost a big pot, however this will never be reflected on my stats. So I can have green stats and be happy but in fact I'm losing big pots to river bluffs and on the other hand I can have negative stats and look for a "leak" in my game where in fact I managed to reduce my actual losses.

So if this post makes any sense to you (sorry for my imperfect english writing skills) do you agree or not?