When trying to make something from coloured logs it says you need the logs twice... IE, A trophy from normal logs says 15 Logs and 10 Cut up leather. When you try from a coloured log it says 15 Yew log 10 Yew log or 15 sapling log and 10 sapling log.
Then where it says how much skill you need to make the item some things are showing over 100. The trophy from yew logs for example... it says you need 107 carp and 60 tailoring.
A bed from normal logs says 100 log and 100 folded cloth, 94.7 carp and 75 tailoring. Then from Yew logs its 100 yew logs and 100 yew logs, 129.7 carp and 75 tailoring.