OnPositionClosed & Close events not consistent

Hey Guys :)
 
If i understood right OnPositionClosed is for positions the bot has opened and Position.Close fired when any position is closed.

I have some code that open and closes  positions in the OnPositionClosed* and also in Position.Close.
In the long run I see that the OnPositionClosed* and also in Position.Close are not called for each position that was closed.

I wanted to know, if this because something I did wrong? or it something that happens and I should relay on  OnTick even for my logic?

Thanks!!