...what is the method of making up for missed rakats during a jamaat prayer i.e. if one makes it late to the mosque for what ever reason?
Also sometimes you can lose concentration during salah...what must you do if in doubt that one rakat has been missed?
Missing rakat invalidates prayer which means re-read, but adding rakat means it can be corrected. Best thing to do is add an extra and do sajdah sahuf at the end.