Ok, so here's a list of all the tag wikis you've edited. I've bolded the ones that don't count.
- shortcuts [repeat]
- software-recommendation [rejected]
- trojan [?]
- lion [rejected]
The non-bolded ones at up to 27, which matches. The count on your profile doesn't update (at least I don't believe it does) when a tag wiki gets orphaned (the tag is removed). Therefore, the count didn't increment for two of your edits to account for the two that got deleted. Your
[shortcuts] edit was a repeat, you can't increment twice on the same tag wiki. The only one that caught my eye was the
[trojan] tag wiki. Your suggestion there got approved and it's listed in the revision history for the tag, but the actual info page for the tag says that there is no tag wiki for it yet.