The majority of scholars are of the opinion that Jumah prayer can not be combined with Asr because there is nothing regarding that which has been mentioned in the sunnah, and also the principle for acts of worship is that they should be based on textual evidence and there is no room for affirming permissibility based on comparing jumah with Dhuhr. This is so because Dhuhr differs from Jumah in terms of its characteristic, rlules and conditions. So basing on this I do not see the permissibility of combining Jumah with Asr.
As for what you mentioned saying that people combined Jumah and Asr prayers in your mosque, this is not correct as I have earlier explained but I do not think that people should repeat Asr prayer because the Shafite scholars are of the opinion that it is permissible to combine Jumah and Asr if it has been done in the past but they forbid doing it in future, though the best would be to repeat as a precautionary measure.
Dr. Khalid al-Muslih
06 / 09 / 1429 AH