I think I cleared my cache properly but archive page buttons keep showing standard/old style en new updated ones mixed up all the time.
This happens also all the time with product search labels (after properly translating the strings in WPML properly) in my multilingual page (Dutch)
Also, icons in search button appears above sometimes when they should show on the left (which they sometimes do as they should)
Normally we advise customers to go to the WPML forums in order to resolve translation issues, but before you open a ticket there I would recommend that you delete your translation of the item in the string translations plugin and refresh, then re-translate the text.
Our WPML team is much better equipped to handle translation issues like these.