Have receipt number but no receipt notice

I requested my university to check my sevis status and they said that it shows " pending change of status". They provided a receipt number also. However my employer has not received the receipt notice from uscis.

When i checked the receipt number got from sevis on the uscis website " on april 21, we updated your name for your form i-129… Receipt number eac…,"

Does this mean iam picked in lottery. Will i get the receipt notice soon… Please explain why this status is coming.