Good catch, the total amount for the prizepool from the displayed amount is only around 0.06btc while the contest itself says 0.1btc prizepool.
However, if we delete a single 0 from the 6-20 paid places, the total prizepool would be more than 0.1btc
It must be a wrong calculation by coinroyale as you pointed out for the 4th and 5th paid place.
Other confusing thing is about the 10-20, they are all with the same amount 0.0004btc but why it need to be grouped separately? 10th=0.0004btc 11-15th=0.0004btc and 16-20th=0.0004btc.
It should be fixed as soon as possible before the contest start within the next 10 hours.