Seriously why can't I fix a tag/category if I type it in wrong???

Today I accidentally typed half a tag word into the tag form and saved. Then I realized the error of my ways and attempted to fix it. I removed the bad tag, added some new ones and updated the post. It added the new tags but I could not get it to replace the incorrect one.

As much as this bug may have helped me inadvertently expose members of the Cryps to Cryptocurrency.. I would love to reclassify the post correctly.

Post in question: https://steemit.com/cryp/@hashparty/q-what-happens-when-a-bunch-of-companies-ico-on-the-ethereum-platform