I was in the same position a while back. Your problem is that Loopy's shorthand is a bit confusing. I'll see if I can explain it a bit better. The important thing to note is that the long strings of 0's and 1's are a bit mask. A 1 indicates that that bit position is affected, and a 0 indicates that it is not.
This means that when a byte of data 'd' is written to $2000, the lower 2 bits of 'd' will be placed into bits 10 and 11 of the temporary register 't'.
2005 first write:
This means that when a byte of data 'd' is written to $2005, and it is the first write to $2005, then the upper 5 bits of 'd' willl be placed into the lower 5 bits of temporary register 't'. In addition, the lower 3 bits of 'd' will be placed into a separate register which Loopy named 'd'.
The names 't' and 'd' are from Loopy's document, and those registers are used by the ppu to refresh the screen. I hope this helps.