I changed the gear oil a month or two ago in my alpha 1. When I pumped the gear oil back in, I stopped when the level almost reached the line in the reservoir. Even after I capped everything back off, the level continued to rise for a few minutes. I had to drain a bit out of the reservoir so it would not be over full. I am now noticing after 12 hours or so of use, the level in the reservoir is dropping. I dont see any leaks anywhere. Is this normal, or should I be concerned?