niche model spilling outside my shape file

Hello!

I am currently working on using the ecological niche model tool, the only problem I have is that when I create the grid file some of the values fall outside areas where it should be physically impossible for them to exist, ie off of the land.

As it usually is just roughly a few pixels off of the land boundaries it leaves me wondering if this is an issue with my projections, or if this is normal for this tool.

Thanks!