When I vote to delete a question, the confirmation dialog states that I have 2 votes remaining:
When I choose "OK", however, the vote limit error pops up:
I can confirm, from my profile, that I have cast 13 delete votes today; the displayed count in the error is correct.
I have 18,325 rep on that site and therefore, according to this (assuming that answer is still up-to-date), I should have 5 (base) + 8 (rep) = 13 delete votes. That implies the error message itself is deserved.
Therefore, the dialog is incorrect, and I do not have 2 votes remaining.