If the sex scene is not explicit, the correct tag is ‘soft yaoi’. Putting both Shounen ai and Yaoi there is just nonsense.
If there is no sex scene, it’s Shounen ai.
If there is sex scene, it’s yaoi.
There is nothing in between.
If it is sex but not explicit, it is A sub-tag of yaoi, called ‘Soft Yaoi’.
When people search for Shounen ai, they expect no sex at all, explicit or not. Putting a shounen ai tag in Yaoi is violation of the tag law. You basically redefine a word in the dictionary because you don’t know how to use it properly.
I suggest you change this. Terminology and laws are made to ease the problem of filtering and searching, any violation is not allowed.