The relationship between these categories is odd. I noticed going through a lot of Dagasi's portal artwork, that in addition to being tagged with portal_amputation, they are all tagged with [insert number of and/or type of limbs]_ampution, and (either via aliasing, or actively) with amputee. However, amputee also has disability aliased to it, and portal_amputation is not a disability. You still have full control of your limbs, and they are still on your body, they're just on the other side of a portal. It's basically extreme bondage.
I'm not sure what the best solution here would be? The two I can think of are making a clear distinction on the wiki pages and saying that portal amputee stuff is not to be tagged with normal amputee tags (I do notice they are not aliased at all), or unaliasing disability from amputee (and now I'm thinking about how Rayman works in that regard, heh.).
If portal amputation is already not supposed to use normal amputation tags, then I apologize. Considering how many posts share the tags (not just Dagasi's work), though, I figured it was better to ask/clarify before I made any changes.