I am using RLcraft on my computer and I followed an internet tutorial on what to do with the downloaded file. It told me to open up the downloaded file (RLCraft+1) and then copy the contents of the subfolder titled "overrides" into a folder within my minecraft folder (just to use as the directory file for the minecraft launcher) making sure nothing was in the mods or config folders beforehand. Then I said "replace all" to all the files with the same names, and then ran minecraft using the forge launcher needed. Yet when minecraft starts, and forge runs smoothly, I find there are only 4 mods loaded- the ones which you get by default with forge. Please help and many thanks!
ps
Other things you might need to know is that I already started a minecraft game (unmodded) using the special directory file, so all the default needed minecraft files I think are in there. I also tried doing it normally, using the dominant minecraft folder with the mods, and that gave me the same result. I'm using a mac, and I am in minecraft 1.12.2 which is the same version of forge I am using, and that the RLCraft mod pack said it worked for.