Low fees are used in these transactions.

https://blockchain.info/tx/05f5625518e97fb5d5def38fc4cc0484be5cd67fce2fb15e20200dcb00a09d73

108 satoshis/Byte

https://blockchain.info/tx/4091fbea8647ce82fe63b304fe7eac540098e0e5887cfc8f301406bd93482ebc

124 satoshis/Byte

https://blockchain.info/tx/a866d75f05acf1eebb3c74b1e997d58a7be780c335c7dcfe99517405dd0e98ff

124 satoshis/Byte


Try using higher fees to increase their confirmation speed in the future.
Median is 200 sat/B

Check this link to know more: https://bitcoinfees.21.co/