Sometimes it's like that.
There's a saying floating around here, a reminder, that "the first set is a lie," meaning that the first set, especially squats, will feel about 50lbs heavier than it really is. But you'll get through it, just as you will the next two sets, which will feel lighter than that first set. Unfortunately, for the deadlift, it's only the first set. Great work, Rich!
Keep at it!