When we getting a fix on this /u/JagexRyan?
It depends what you consider a 'fix'. It is intentional that you don't get a complete 1:1:1 ratio.
I did however make changes so that we remember the last 5 artefacts that you've discovered (currently we only remember 3) which will help with the 3 artefact excavations. This is set to go live next week.