1) Can/Should I be wearing a belt during the Deadlift?
No.
2) Is that too many dips? Should I start adding some weight and get them into the 5 rep range?
Whether they are too many is entirely up to you. But no they really don't need ot be in the five rep range.
3) Monday I'll be doing the Bent over Row. It's my least liked exercise for some reason. Is there anything else that's as good or better I could substitute in? Oh and I started finishing that workout off with pullups, is that OK?
Well personally I think it'd be great if you just concentrated on pullups/chinups for a while. They are every bit as important an exercise as rows and I'm on a personal mission to get them the recognition they deserve
Also you could alternate the rows and pullups so you could get more out of both. However, I know you asked about using a belt on the rows. Which at 105 pounds would be silly. I suspect it's your form. Are you keeping your lower back set (keeping a tight natural arch)? Are you trying to go too low as far as parallel? You upper body should be as low as possible while still keeping your lower back set which usually means there is a slight angle with your shoulders a little higher than your hips. Any other thoughts as to what is giving you problems?
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Congrats on the gains! And the numbered question format is a good idea. Makes it really easy to respond
And sorry for the late reply. I was thinking someone else might comment....