You're fine. A change in rate (unless there's a lock in place) between the LE and the CloD is not a problem. Where you need to be careful is changes between the time the CloD was issued and closing that increase the finance charge so that the APR on the CloD you issued before closing is no longer accurate.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8