Drywall Topping Compound HELP HELP

I am doing a repair around my bathtub in prep for a tile person. I have a glass block window where one of the pieces of edge metal was not installed. I installed it and covered it with some 20 minute all purpose, but over the whole piece of greenboard to even it up I used a topping compound. Same along a corner near the bathtub, first I used all purpose but to fill void about 1/4" deep to flush the wall out I used a topping compound. It says now that I need to read it not to apply it to bare drwyall/greenboard. Did I goof? I hate to have to tear it all apart and redo it. The tile guy is going to nail paper and run cement on top and put tile. He just wanted a corner to wrap his tile around. Is topping compound durable at all?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.