Because those two are only a hair worse then the Benchmark DAC3So many people mess this up for some reason ...
Than
Than is a conjunction used in comparisons:
Tom is smarter than Bill.
It’s warmer in Florida than in North Dakota.
Is she taller than you?
Yes, she is taller than I..
Then
Then has numerous meanings.
At that point in time I wasn’t ready then.
Will you be home at noon? I’ll call you then.
Next, afterward I went to the store, and then to the bank
Do your homework and then go to bed