Hi,
Are you rotating/pivoting for the tip?
If you paint the edge with a permanent marker, it can help you see if you're grinding on the edge or above it
Tips can be fatter , but its more likely you forgot to rotate/pivot , so you're lowering the angle on the tip, that means more metal to remove before its sharp.
To maintain angle throughout the tip all you have to do is pivot the blade throughout the curved parts like this gif.
The little green square indicates 90 degrees to the stone , and always finish the stroke on the stone (tip remains on stone)
The key is to make sure the edge is contacting stone (look).
If the stone is vertical,like in a sharpmaker, then merely pivoting 90 to the stone is comfortable.
If stone is horizontal , you might throw in a little lifting of the handle for comfort.
Here is an example of a very recent video
[video=youtube;oRmcQ-MqbBE]https://www.youtube.com/watch?v=oRmcQ-MqbBE[/video]
If that doesn't feel right, you can always go vertical,
by leaning your sharpening stone against a wall or book to make a
bench stone sharmaker and just slice down the stone and pivot for tip, no handle lifting