E filing problem wrt deductions and donations

i am a central govt defence pensioner. i am trying to file my returns. when I came to the deductions portion and filled in the ppf and other details, the application accepted the data. but the moment I enter the 80GG details, the application is adding it to the previous amount and giving me a warning of overshooting the deduction limit. is this OK? has anything changed since last time? secondly I have donated some money towards covid relief activities for which the ashram claims, I am allowed 100% deduction, yet the application is not accepting the amount and deducting it from the total taxable amount ? can you please help me if there has been any changes in the rules. thanks