Ahle sunnat wal jamaat has believe that Aulia Allah by will and power of Allah can perform something that is normally considered impossible.
A muslim believe that Karamat is totally under control of Allah.
It is not related to the will or status of a person (Aulia Allah) .
It is by Allah will and not the Desire/status of person have much Role.
It is also not a criteria for greatness of Aulia Allah. Criteria for
greatness is that he/she should be follower of Kitab O Sunnah (Muttabae Shariat)
Sometimes a person other than Prophet may get Kramat from Allah.
Eg: Quran says that Hazrat Mariyam used to get fruits without season and Prophet Zakaria was not getting,But it does not mean that she became bigger than Prophet.
Karamat/Maujazah may differ for same person at different time.
Yaqub Alaihissalam could not trace from the well of Kunan But By will of Allah he could smell the cloths of Yusuf Alaihissalam from far away Egypt.
So if you will see the Karamat e Aulia with Muslim vision you will find the greatness of Allah.
Otherwise you may find something else if you consider that it has been done by the Aulia Allah, then it will become shirk,as Some of the groups are smelling Shirk in Aulia Allah Stories.
May Allah show all of us Right path.
I am quoting from Shaykhul Islam Ibn Taimiyah (RA)
Ahlus Sunnah believe in Karamat of Auliya: By Shaykhul Islam Ibn Taimiyah (RA) [Sharh Al-Aqeedat-il-Wasitiyah]
وَمِنْ أُصًولِ أَهْلِ السُّنَّةِ: التَّصْدِيقُ بِكَرَامَاتَ الأَوْلِيَاءِ وَمَا يُجْرِي اللهُ عَلَى أَيْدِيهِم مِّنْ خَوَارِقِ الْعَادَاتِ فِي أَنْوَاعِ الْعُلُومِ وَالْمُكَاشَفَاتِ وَأَنْوَاعِ الْقُدْرَةِ وَالتَّأْثِيرَات ، وَالمَاثُور عَنْ سَالِفِ الأُمَمِ فِي سُورَةِ الْكَهْفِ وَغَيْرِهَا، وَعَنْ صَدْرِ هَذِهِ الأُمَّةِ مِنَ الصَّحَابَةِ وَالتَّابِعِينَ وَسَائِرِ فِرق الأُمَّةِ، وَهِيَ مَوْجُودَةٌ فِيهَا إِلَى يَوْمِ الْقِيَامَةِ ۔
The testimony of the Karamat (charismata) occurred by the Auliya (those righteous people who are close to Allah) also forms part of the principles of Ahlus-Sunnah, as also the testimony of all those extraordinary occurrences and habits which Allah manifests through them in terms of various knowledges, spiritual experiences, powers, and influences and those that are mentioned in the Qur'anic Surah Al Kahf etc. regarding former communities and about the initial period of the Sahaba and Taba'een of this Ummah till today and will continue to remain till the day of judgement.
