sorry if this is a duplicate, could not find anything while searching

so say I wanted to create a 32x32 texture pack. most animations would look like this (frame positions in image)
[ 0 ]
[ 1 ]
[ 2 ]
[ 3 ]
etc...

but flowing water & flowing lava animations require this:
[ 0 ][ _ ]
[ _ ][ _ ]
[ 1 ][ _ ]
[ _ ][ _ ]
[ 2 ][ _ ]
[ _ ][ _ ]
etc...

this is not a problem normally, but for things that use these textures (for example mods, falling block entities with custom ids created by mods, server plugins, etc.) they will display the full
[ # ][ _ ]
[ _ ][ _ ]
(in this case a 64x64 square, with only the top left hand corner being textured)

I know this relates to modifications, but like I said, custom id falling blocks can be created on servers with plugins which require no client modifications. please fix it, it is driving me crazy.