When I place tanks or irrigation channels the texture is place 2 blocks away but the hitbox is still there. It just might be optifine.

Sadly I have no idea why it's happening and there's no way for me to debug this. You'll either have to play with Optifine settings, or take this to the Optifine devs.

Can you add a screenshot of this, and try without Optifine as well?
Also, what version is this?

It works fine without optifine

and It's AgriCraft-1.7.10-1.4.0-beta-1-1.7.10

Update to the last beta and see if it persists, I changed a small thingy in that one.

Well now it's just taking a while to put the texture there but it shows up then when I break the blocks it flashes the texture. .-.

huh?

But is that a problem when you break the block?

Yes because the block isn't there but the texture for it flashes being there to not being there.

So the texture stays or what?

The texture shows up but when you break it it flashes the texture.

I'm sorry I have no idea what you mean by that :s

1. You place block 2. texture shows up in the right spot 3. When da block broken = texture still there but it flashes the texture from being there to not being there but the actual block isn't there. meakz da centz?

"The texture flashes...", okay thats a minor nuisance,
"...from being there to not being there but the actual block isn't there", so no texture and no block, I don't see the problem?

Flashing texture when block broken but the texture still shows up but then disappears then shows up then disappears endlessly unless you reload the world.

Okay, thanks, now I understand

When I place a block down it shows up but when I break it the texture will flash from being there to not being there.