Filters seems widening search instead of narrowing

[exoego]

https://index.scala-lang.org/search?q=sbt-scalajs-crossproject shows an expected result (1 exact match project).

However, if I use Filters in sidebar to narrow search results, it widen search results.
I think this is not an expected be behavior for search filters.
https://index.scala-lang.org/search?q=sbt-scalajs-crossproject&scalaVersions=2.12

Expected behavior

I expect Filters should narrow search results, so one can search projects specific to scala version, scala-js version, or something like that.

[julienrf]

I’m closing it since it’s a duplicate of #473, but thanks for the detailed report with screenshots!