How do I identify the different stages of meiosis under microscope?
ID characteristics that can help you recognize diplotene  better: 

diplotene : 
the only difference between this phase and Diakinesis is that The centrosomes reach the poles. 

you can see the photos of diplotene and diakinesis here :

http://www1.biologie.uni-hamburg.de/b-online/e09/meiosea.htm






(a) polyploid nutri-tive cells with many heteropicnotic chromatin bodies; (b) leptotene-zygotene; (c) pachytene; (d) diffuse stage; (e) di-plotene; (f) diakinesis; (g) metaphase I; (h, i) anaphase I; (j) telophase I;. (k) metaphase II; (l) anaphase II; (m) telophase II; (n) round spermatids; (o) elongating spermatids; (p) head of sper-matozoas. Big arrows indicate sex chromosomes, small arrows point to nucleoli and arrowheads indicate m-chromosomes

You can see all the phases clear and perfectly separated here : 

http://biology.about.com/od/meiosis/ss/meiosisstep.htm#step1

by the way , try to adjust microscope as best as you can &amp; don't put much  oil immersion .