Change categories

Good evening,

Sorry for my English,

I followed a tutorial on this forum (I do not find it any more …) to change the categories.

I deleted the old ones and add mine via the Toolbox and bulk Import.
It seems to have worked, except on the homepage. I have to re-try several times. But still the same thing … I search on the forum and google and I did not find the solution. I use classifieds theme.