It is surely not from buying or not buying tokens. Either you have faced opponents using proper counter tactics or the program has decided to give you a bad run or it could be a combination of both. If it is from the program, you will notice as if your players are being blocked from performing as they usually do and/or you will notice poor ratings for most of your players or ratings that your players don't usually get. This may last for a period of time, especially for the competition concerned. So, expect more like this.