additionally, there should be special tiles with both trees available in some tilesheets - I know those exist for VXA, and that is what you state to use on your profile even if you posted in VX (which is a different engine than VXA)
You should be able to fix this by editing your tileset in GIMP/SAI/PS or any other image editor that lets you save an image with a transparent background. What you want to do is called "clumping", it's where you move your assets around and overlap them to make them look more natural.
Sigh... to have some variety in this weather. More than just sun and rain and wind and thunder.
In the meantime, I've discovered that I'm slowly becoming fatigued from the many sleepless nights my neighbors cause. Or at least their dogs. Always barking at something.
I might need a day to just sleep and recharge.