He WROTE "INFERIOR". Don't change his words for your argument.
You seem to consistently make serious logical errors.
1. Jefferson thought blacks to be inferior.
2. Jefferson wanted slavery to be addressed in the initial U.S. documents.
You are making a logical error by assuming that 2. necessitates that you must think blacks are the equals of whites in order to not think they should be slaves. That is a fallacy. It is very easy to imagine that one might be morally opposed to slavery even of "inferior beings" (just as one might oppose making puppies work for us). Even if moral reasoning is ignored, it is easy to imagine Jefferson may have opposed slavery for pragmatic reasons--namely, the desire to get the issue out of the way to avoid a civil war, which did indeed result. Whether he thought blacks to be inferior is completely irrelevant to the statement that he was horrified that slavery was not addressed.