Aston Villa have a 51 points start on Man City and are trading at about 1/2. West Ham have a 44 point start on City too.
The markets on the exchange are always a good indication of the current position given its punters and bots who are doing the laying.
I presume that there are other teams, Leicester for example, that have more points on the handicap than Spurs and have shorter odds but both prices you've highlighted are strange. Can you link to the market or let us know which bookie it is.