So I am applying to art colleges, and many of them require rec letters. So I asked few of my teachers to write my letters, and they said they submitted their letters. However, when I went in to the application page,(not CommonApp; those schools have their own seperate app. pages) it appeared as “notified”(same as “not submitted” I think), not “submitted”.
Just to make sure, I asked to my teachers to check again for their letters, and they said they submitted the letters. But I have no idea that why college app. pages say they do not receive the letters.
Should I send an email to admission office? Why these things are happening??
(Sorry for any grammatical mistakes or something- English is not my first language)
Call the schools
Most colleges take a little time to post material received. It’s likely that the letters are submitted and the status check page just hasn’t updated it yet. Cornell for example says to allow 7-10 days for all material to post and longer during peek periods. Also, colleges generally email you if materials are missing. I would give it some time. You can always email the college and ask them if they received the recommendations.
Thanks 
Just one more question- does electronic letters(not the actual mails) also take 7-10 days?
It may take 1-2 weeks to file and update the record even for electronic submission.
I think it’s because colleges have to pair all the information to your application and then it all needs to be posted on your status page. So I think allowing a full 2 weeks, sometimes even 3 is realistic. Penn state took about a month to report they received all my D material even thought it was all submitted electronically along with her application.